persamaan garis melalui titik P (6,-4) sejajar dgn garis yg melalui titik A (2,-5) dan B (6,7) adalah...

m = [tex]\frac{y2-y1}{x2-x1} = \frac{7 - (-5)}{6-2} - \frac{12}{4} = 3 [/tex]
 y = 3x + c
6 = 3(-4) + c
6 = -12 + c
c = 6 + 12 = 18
y = 3x + 18