Edgar M.

asked • 09/30/12

(2,-2) slope=2 how to put it in slope intercept form

i cnt figure out how to do this

3 Answers By Expert Tutors

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Darrell B. answered • 10/02/12

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Alejandro L. answered • 09/30/12

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Helga M.

Alejandro is absolutely right. But here are a few more comments to help you understand.
              y = mx + b
is called the slope intercept form because you can read off directly the slope (m) and the intercept of the y axis (b).

When you are given the slope and a point, you use the points x and y coordinate as the x and y value in this equation and solve for b.

If you are given two points, you first determine the slope from both points and then use one of the points (it doesn't matter which) to find the y intercept.

So let's say you were given (2, -2) and (5, 4)

Calculate the slope as (y1-y2)/(x1-x2) = (-2-4)/2-5) = -6/-3 = 2

and then continue as Alejandro described.

 

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10/01/12

Jose R. answered • 09/30/12

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