Question

Help me.. tentukan persamaan garis yang tegak lurus 2y + 2 = - 7/4 (x-7) dan melalui titik (-2,-3) !

Answer 1

2y = -7/4x + 49/4
y = - 7/8x + 49/8

m = -7/8

gradien tegak lurus = -1/m
= 8/7

(y+3) = 8/7 (x +2)
y + 3 = 8/7x + 16/7
y = 8/7 x - 5/7 => dikalikan 7
7y = 8x - 5