gradien yg melalui titik (-4,7) dan (2,-2) adalah

(-4,7) = (x1,y1)
(2,-2) = (x2,y2)

m = y2 - y1 / x2 - x1
m = -2 - 7 / 2 + 4
m = -9/6
m = -3/2

Titik (-4,7) --> x1 = -4, y1 = 7
Titik (2,-2) --> x2 = 2, y2 = -2

Gradien garis
m = (y2 - y1) / (x2 - x1)
m = (-2 -7) / (2 - (-4))
m = (-9) / (2 + 4)
m = -9/6
m = -3/2