SOLUTION: How do you write an equation for these points in slope-intercept form (-2,-9) (4,9)

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Question 259251: How do you write an equation for these points in slope-intercept form


(-2,-9) (4,9)

Answer by Alan3354(69443) About Me  (Show Source):
You can put this solution on YOUR website!
Do it like this one.
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This is a 2 step process. First find the slope of the line thru the points.
slope, m = diffy/diffx
m = (5-1)/(3-2)
m = 4
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Now use y = mx + b with either point to find b, the y-intercept.
y = mx + b
5 = 4*3 + b
b = -7
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y = mx + b
y = 4x - 7 is the answer.