You are asked to find the equation of the line that passes through 2 points: (-2,8) and (-4,-4).
1st step: Find the slope of the line
slope: m = change in y / change in x
m = (8 - (-4)) / (-2 - (-4))
m = (8 + 4) / (-2 + 4)
m = 12 / 2
m = 6
2nd step: Put one of the given points and the slope into the "Point-Slop formula": y - y1 = m (x - x1)
y - 8 = 6 (x - (-2))
y - 8 = 6 (x + 2)
y - 8 = 6x + 12
y = 6x + 12 + 8
y = 6x + 20
Equation of the line that passes through (-2,8) and (-4,-4): y = 6x + 20
