Persamaan suatu garis yg melalui (5,-1) dan titik (-3,2) 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) Pke caranya

Kelas 8 Matematika
Bab Persamaan Garis

(y - y1)/(y2 - y1) = (x - x1)/(x2 - x1)
(y + 1)/(2 + 1) = (x - 5)/(-3 - 5)
y + 1 = 3(x - 5)/(-8)
y = ((3x - 15)/(-8)) - 1
y = (3x - 15 + 8)/(-8)
y = (3x - 7)/(-8)
y = (1/8) (-3x + 7)

✩✩ B ✩✩