What is the slope-intercept form of the equation of the line that passes through the points (2, 7) and (4, −1) ?

Use the rise over run formula to find the slope:





Find the y-intercept of the line by multiplying the slope by the distance between x = 0 and a point. We'll use (2,7) to find the y-intercept.

0 - 2 = -2

-2(-4) + 7 = 15

The new point on the line is (0,15). Since x = 0, 15 is your y-intercept.

Plug in your slope and y-intercept into the equation:

The answers are 20,30,80,180,960,890,1230,4560. on the first row