Algebra worksheet

Hello. My algebra teacher gave me this worksheet last week and everyone had to bring it yesterday and I haven't done it yet. Can someone please help me. He said Friday is the last day or he's going to take away some points. I've been having trouble with all these math problems. I feel like the class is moving to fast and i'm just there. My mom does try to help me but she always yells and gets mad at me when i don't understand so I just decided its better of to just study alone. I'm going to start with my new tutor next week and i'm going to write these questions and let her explain to me but for right now I really need these answers. Please please don't say i'm lasy becuase i'm really not i'm just a bit slow when it comes to math. Thanks to who ever answers in advance.


1.Determine whether the equation represents a direct variation. If it does, find the constand of variation. 2y= 5x + 1

Not a direct variation
Direct variation, constant of variation is 5/2
Direct variation, constant variation is 2/5
Direct variation, constand of variation is 1-2/5

2. Determine whether the equation represents a direct variation. If it does, find the constant of variation.
-12x=6y

Not a direct variation
Direct variation, constant of variation is 1/2
Direct variation, constant variation is 2
Direct variation, constand of variation is -2

3. Determine whether the equation represents a direct variation. If it does, find the constant of variation.

0.7x-1.4y=0

Not a direct variation
Direct variation, constant of variation is 1/2
Direct variation, constant variation is 2
Direct variation, constand of variation is -2


4. Suppose y varies directly with x. Write a direct variation equation that relates x and y.
y= -10 when x=2

y= -5x
y= -1/5x
y=5x
y=1/5x


5.Suppose y varies directly with x. Write a direct variation equation that relates x and y.

y=10.4 when x =4

y= 3.4x
y=3.8x
y=3.2x
y=2.6x


6. Suppose y varies directly with x. Write a direct variation equation that relates x and y.
y= 7 1/2 when x =3

y= 3/2x
y= 2/3x
y=5/2x
y=2/5x

7. graph the direct variation equation.
y= 1/3x


8.graph the direct variation equation.
y= -1/2x

9. For the data in the table, tell whether y varies directly with x. if it does, write an equation for the first direct variation.
x y
3 5.4
7 12.6
12 21.6

Not a direct variation
Direct variation, y= 1.8x
Direct variation, y= 4x
Direct variation, y= 5/9x

10.For the data in the table, tell whether y varies directly with x. if it does, write an equation for the first direct variation.

x y
-2 1
3 6
8 11

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asked by 9thgradestudent
  1. No one here will do your whole worksheet for you, but my suggestion to you is the same I give my granddaughter: Go talk to your teacher, and set up a tutoring time with him.

    After you meet with your new tutor next week, you may or may not need to do this again, but you need help now! Talk to your teacher!!

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    posted by Writeacher
  2. The whole assignment seems to deal only with one simple concept, a direct variation

    Sometimes text or your notes have definitions that are difficult to understand.
    Here is the definition that is easy to understand:
    A direct variation gives you an equation that contains no constants, and there are no exponents on the two variables.

    e.g. y = 8x is a direct variation,
    but y = 8x + 4 is NOT, since I see a constant of 4

    a direct variation can be written in the form
    y = kx , where k is the constant of variation

    #1, not a variation, I see a +1 sitting there as a constant
    #2, yes it is a direct variation:
    -12x = 6y
    6y = -12x
    y = -2x
    so the constant of variation is -2 , if y varies directly with x
    or
    -12x = 6y
    x = -(1/2)x
    now the constant of variation is -1/2 , if x varies directly as y
    so it depends how you express the equation, either in terms of x or in terms of y

    #3,
    .7x - 1.4y = 0
    .7x = 1.4y
    1.4y = .7x
    y = (.7/1.4)x = (1/2)x
    so , yes it is, and the constant of variation is 1/2

    From #4 on, you have to first find the equation.
    I will do #4, you try the remaining.

    #4, they tell us it is a direct variation, so it must look like
    y = kx
    They give us x=2 when y = -10
    let's plug in those values:
    -10 = k(2)
    2k = -10
    k = -5
    aaahhhh, so y = -5x is our equation

    #6, same way, just some fractions to deal with

    #7, to graph, pick any x, and find the y to get ordered pairs,
    e.g. let x = 3, then y = (1/3)(3) = 1, --> point(3,1)
    let x = 9, then y = (1/3)(9) = 3 ---> point (9,3)
    plot those two points, and join with a straight line

    Notice how I picked multiple of 3's for my x's so I could take 1/3 of the x without ending up with fractions?


    #8 , same as #7, pick multiples of 2 for your x's

    #9 and #10 are the same type
    #9
    assume it is a direct variation, then its equation must be
    y = kx
    use the first given data: x = 3, y = 5.4
    then 5.4 = k(3)
    3k = 4.5
    k = 1.5
    equation is y = 1.5x
    do the other points satisfy our equation?
    for (7, 12.6)
    is 12.6 = 1.5(7) ?
    12.6 = 10.5 ??? NO, so the given data is NOT a direct variation

    #10 same way

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    posted by Reiny
  3. well the answers are
    1 A
    2 D
    3 c
    4 A
    5 C
    6 D
    7 A
    8 C
    9 B
    10 A
    thank you @Reiny

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    posted by tbh
  4. @tbh and @Reiny are right! Those are the correct answers.

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    posted by Ellie
  5. TBH all right but 3 cuase 3 is B

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    posted by Answer
  6. TBH and Answer are correcto mundo!

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    posted by Mac N 🧀
  7. 3 is b

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    posted by thank you
  8. Hjshhsjsjs

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    posted by Anonymous
  9. tbh is right, except for 3. The answer to 3 is b.

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    posted by Deez Nuts
  10. thank you so much

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    posted by connexus
  11. this isnt a "worksheet" this is a practice in algebra thats a grade

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    posted by lol
  12. still right in 2017 100% with 3 as B. and yeah this is a connexus practice which counts for 0% of your overall grade, lol.

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    posted by caitlyn
  13. man I feel ya, whenever my mom tries to help me with algebra she yells at me when I don't understand

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    posted by Xavier
  14. Thank you so much everyone!!!!!!! 9thgradestudent If you see this a good website is
    Mathifun and purplemath
    Hope all of you have a great day!! help math answer y maths x lifted XD LOL!!

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    posted by I LOVE HORSES
  15. and @Xavier there are good websites!!

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    posted by I LOVE HORSES
  16. Well practice still counts apparently

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    posted by Whatever
  17. Same Xaiver

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    posted by Chomper
  18. Correct ;)

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    posted by DingDong
  19. 3 is B to get 100%

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    posted by Anonymous
  20. 1. A
    2. D
    3. B
    4. A
    5. C
    6. D
    7. A
    8. C
    9. B
    10. A

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    posted by Sam
  21. is this for connexus?

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    posted by Fart
  22. thank you so much sam!!!!

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    posted by idkoops
  23. @Sam is correct!

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    posted by Anonymous
  24. Okay Okay Okay @Sam IS Correct, But That's Not What I'm Commenting About, What I I'm Is WriteTeacher Even A Teacher Because I've Been Working As A Teacher/Foster Care For 7 Years Now and That I Not How You Treat Someone Who's Struggling As A Student and At Home, Shame On You.

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    posted by Anonymous
  25. 5 is b

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