SOLUTION: write a equation for a line that passes through the points (-1,5) and (2,-1)

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Question 121811: write a equation for a line that passes through the points (-1,5) and (2,-1)
Answer by MathLover1(20850) About Me  (Show Source):
You can put this solution on YOUR website!

Solved by pluggable solver: FIND EQUATION of straight line given 2 points
hahaWe are trying to find equation of form y=ax+b, where a is slope, and b is intercept, which passes through points (x1, y1) = (-1, 5) and (x2, y2) = (2, -1).
Slope a is a+=+%28y%5B2%5D-y%5B1%5D%29%2F%28x%5B2%5D-x%5B1%5D%29+=+%28-1-5%29%2F%282--1%29+=+-2.
Intercept is found from equation a%2Ax%5B1%5D%2Bb+=+y%5B1%5D, or -2%2A-1+%2Bb+=+3. From that,
intercept b is b=y%5B1%5D-a%2Ax%5B1%5D, or b=5--2%2A-1+=+3.

y=(-2)x + (3)

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