the equation for a line through the points (12, -8) and (-4,-40)
So first, find the slope, m.
Slope would be the change in y over the change in x.
slope formula: m = [y1 - y2] / [x1 - x2]
So slope would be (-8 - -40) / (12- -4)
Which would be 2.
Then, plug in the slope and a point into the point-slope formula:
y – y 1 = m(x – x 1)
so if you use the first point:
y – -8 = 2(x – 12)
y+8=2(x-12)
Distribute the 2, and move the 8 to the right side to get y=
+5478 
