math

I need help with this question.

Write the equation of the line which contains the point)0, -3) and whose slope is 4.

A general line equation can be written as
y = mx + c, where m is the slope and c a constant.

so we can write this as y = 4x + c
Substituting the point (0, -3) in the equation, we have

-3 = c

So the equation is
y = 4x - 3

or 4x - y - 3 = 0

The explanation is long but i try to go step by step with it so you can understand it.

first use the formula of line which is :
y=mx+b

you have already your slope which is : 4 which in the formual for line would be your letter m. so substitute that in.

now they give you a set of point. which is (0,-3). NOw you know that 0 is your x point and -3 is your y point.
therefore looking at the equation of the line you substitute these two numbers like so.

y = mx +b
so , you have already the following:

y = 0
x = -3
m = 4

so the equation looks like this now after you substitute.

0=4(-3)+b now you find b so you do the following:

0= -12+b
0+12 = b
12=b

so now you write the equation of the line again:
y=mx+b
so your equation you just substitue the m and b and that would be your answer and it should look like this

y=4x+12



sorry g you are incorrect because they already gave the point and you need to find for b . in your case you put c. so your finding for c.



Yes, Jasmine20, we had to find the constant and I did exactly that. You misread the point (0, -3). The x is 0 and y is -3.

Thank you so much for explaining this
jasmine. It now makes sense.

TAMMY SORRY I DIDN'T REALIZE I DID USE THE Y WRONG AND X JUST REVERSE THEM BUT THE STEPS ARE THE SAME. AND THEN YOU SHOULD GET

Y=4X-3

SORRY FOR THAT LITTLE MISTAKE. i WAS TYPING QUICK AND I DIDN'T CATCH THAT.

SO THEN

(0,-3)
-3=4(0)+B
-3=B

Y=4X-3

asked by Taylour

Respond to this Question

First Name

Your Response

Similar Questions

  1. math

    i have more than one question so if u no any of the answers please tell me 1.) write the point-slope form of the equation of the line with slope -2 passing through the point ( -5, -9). 2.) write the point-slope form of an equation
  2. ALG 2!!!

    6. What is the slope of the line represented by the equation x = -9? 7. Write an equation of a line with a slope of 0 and passing through the point (5,4). Hint: To answer this question, consider the type of line that has a slope
  3. Math!!

    HELP PLEASE!!!! 1.Write the equation of a line with the slope of -2 which contains the point (3,6) y= mx+ b y= -2x +b Put in (3,6) and solve for b. Then you know m and b in y=mx + b won't it be..0?? I think it will be zero. Are
  4. math (please help)

    1. Write the equation for the horizontal line that contains point G(-8, 8). 2. What is an equation for the line that passes through points (-1, -4) and (1, 4)? Write the equation in slope-intersect form. 3. Write an equation for
  5. MATH!

    What type of lines have a slope of zero? Write the equation of a line with the slope of -2 which contains the point (3,6) The x-axis has 0 slope. What about any other line with 0 slope? Use y-y1=m(x-x1) with m=-2, x1=3 and y1=6
  6. REPOST!PLZ HELP!ALGEBRA!

    You give up too easily. How? I posted how to get the answer below at the original question. OK but I replied... As did I. Well...I replied...again... Maybe you do understand this for horizontal lines. If you interchange x with y,
  7. ALG 2!!!

    Write an equation of a line with a slope of 0 and passing through the point (5,4). Hint: To answer this question, consider the type of line that has a slope of 0. Then write an equation of that line using the values in the ordered
  8. Algebra HELP!!

    Write the equation of a line which contains the point (2,4) and (-2,2) y = -2x + 2 y = 2x + 4 y = ½x + 3 y = -4x + 2 The slopes has to be (2-4)/(-2-2)=-2/-4 But that's not one of the answers so what do i DO? -2/-4 = 1/2 There is
  9. math,question

    okay i really don't understand this problem. It says: Prove the point-slope equation property which is : Point-slope equation(an nonvertical line with slope m and containing a point (X1,Y1) has the point-slope equation of
  10. geometry

    I would love for someone to check my work on the seven problems that I did. I would be eternally grateful. I am going to list my problems and answers. Even if you only want to check one of them, that would be great. 1. Write an

More Similar Questions