fungsi g didefinisikan dengan rumus g(x) = qx+r jika g(2) = -7 dan g(-5) = 7, nilai g(4) adalah

g(x) = qx + r
g(2) = q(2) + r = -7
g(-5) = q(-5) + r = 7

= 2q + r = -7
-5q + r = 7
----------------- -
7q = -14
q = -2

r = 2(-2) + r = -7
= -4 + r = -7
= r = -3

g(4) = -2(4) + (-3) = -8 - 3 = -11