Linear Algebra

I need help for the Linear Algebra B Unit 2 test. Please help.
1. For the data in the table does Y vary directly with X? If it does, write and equation for the direct variation.
l X l Y l
l 10 l 15 l
l 16 l 24 l
l 20 l 30 l
A- Yes: Y=1.5X
B- Yes: Y=2x
C- Yes: Y=x+5
D- No: Y does not vary directly with X
Answer- D...?

2- For the data in the table, does Y vary directly with x? If it does, write an equation for the direct variation.
l X l Y l
l 32 l 24 l
l 16 l 8 l
l 8 l 6 l
A- yes; 0.5X
B- Yes; 2x
C- Yes; 1.5x
D- no y does not vary directly with X
Answer- D
3- Match the equation to the graph.
-2/3x - 1/4y = 1/3
Answer- B

4- a right triangle has a leg b of length 5 and a hypotenuse of length 15. What is the length of the other leg, A? round to the nearest tenth, if necessary
A- 10.0
B- 15.8
C- 14.1
D- 3.2

5- The table shows the number of miles driven over time.
l Time (Hoursl distance (miles) l
l 4 l 232 l
l 6 l 348 l
l 8 l 464 l
l 10 l 580 l
-----------------------------------
Express the relationship between distance and time in simplified form as a unit rate. determine which statment correctly interprets the relationship.
A- 232: your car travels 232 miles.
B- 1/58: your car travels 58 miles in 1 hour.
C- 58/1: your car travels 58 miles in 1 hour.
D- 10: your car travels for 10 hours.
Answer- C

I'm to lazy to write out the rest. If you know them please tell me. I cant fail this test or i will have to do the 8th grade over again, and i just lost my mom. Not trying to get sympathy, i just really need to pass this test. Thanks! :)

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  1. 1. D - no
    2. D = yes
    3. Can't tell
    4. A - no
    5. C - yes

    Anyone who posts answers with no questions will be banned!

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    Ms. Sue
  2. Is the first one 1.5 or A? because i checked that and it seems right and then number 4 is that C?

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  3. Yes, 1. A.
    4 is close to C -- but I get 15.0. Is there a typo in this problem?

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    Ms. Sue
  4. no there is not.

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  5. #4 No, √200 = 14.14

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