Question

Persamaan garis yang melalui titik A(-3,2) dan B(5,-1) adalah...
a.y= 1/8(-3x+7)
b.y=-1/8(-3x-7)
c.y=1/8(-3x-7)
d.y=-1/8(-3x+7)

Answer 1

Y-y1 / y2-y1 = x-x1 / x2-x1
y-2 / -1-2 = x-(-3) / 5-(-3)
y-2/ -3 = x+3 / 8
8(y - 2) = -3(x + 3)
8y - 16 = -3x - 9
8y = -3x + 7
y = (-3x+7) /8
y = -3x+ 7 × 1/8
y = 1/8 (-3x + 7)