tentukan gradien melalui a) titik p(-2,3) b) titik a(-2,4) dan b(-2,5)

a)
m = y/x = 3/-2 = -1 1/2

b)
m = y2-y1 / x2-x1 = 5-4 / -2-(-2) = 1/(-2+2) = 1/0 = 0