Jawabanmu

2014-06-19T19:15:44+07:00
P(-1 , 7) dan melalui titik (3 , - 7)
y = a(x - x1) + Yp
-7 = a(3-(-1)) + 7
-7 = 4a + 7
4a = - 14
a = -14/4 = -7/2
y = (-7/2)(x + 1) + 7
y = (-7/2)x - 7/2 + 14/2
y = (1/2)(-7x + 7)