given:
(-2,4) and (6,-6)
formulas:
m = y2 - y1 / x2 - x1 (slope)
y - y1 = m(x - x1)
step #1. find the slope.
m = y2 - y1 / x2 - x1
plug in (-2,4) and (6,-6)
(-6) - (4) / (6) - (-2)
m = -5/4
step #2 find the equation for the line.
plug in (-2,4) and -5/4.
y - y1 = m(x - x1)
y - 4 = -5/4(x + 2)
