a(-6,2), b(3,6) y = Mx + b, M is slope and b is the y-intercept
find the slope first:
M = (Ya - Yb) / (Xa - Xb)
M = (2 - 6) / (-6 - 3)
M = -4/-9 = 4/9
using the standard line format
y - Ys = M(x - Xs)
y - 3 = 4/9(x - 6)
y - 3 = 4/9x - 24/9
y = 4/9x - 24/9 + 27/9
y = 4/9x + 3/9
y = 4/9x + 1/3