melalui titik (2,3) dan sejajar garis y= -2x+3

y = - 2x + 3
m = - 2

sejajar m1 = m2 = - 2

pers garis
y - y1 = m (x - x1)
y - 3 = - 2 (x - 2)
y = - 2x + 4 + 3
y = - 2x + 7