To calculate slope (which can be represented as the variable, m), we must use the equation for slope...
m = Δy/Δx = (y-[tex] y_{1} [/tex])/(x-[tex] x_{1} [/tex])
We are given two points, each in format (x, y)
m = (13 - (-2)) / (-1 - 4) = 15 / -5 = -3 (D)
