Persamaan peta garis 2x+3y+1=0 karena dilatasi [0,3] dilanjutkan pencerminan terhadap garis y=x adalah....

P(x, y) dilatasi [O, 3] P' (3x, 3y)
P' (3x, 3y) R(y = x) P" (3y, 3x)
x' = 3y »» y = ⅓x'
y' = 3x »» x = ⅓y'

persamaan bayangan garis
2x + 3y + 1 =0
2 (⅓y') + 3 (⅓x') + 1 = 0
⅔ y + x + 1 = 0 ................dikali 3
2y + 3x + 3 = 0