tentukan persamaan garis melalui titik P (7,-3) dan Q (3,6)

Gradien = [6 - (-3)] / [3 - 7]
= - 9 / 4

y = -9/4 x + b
6 = -27/4 = b
24 /4 + 27/4 = b
51/4 = b

y = -9/4x + 51/4