diketahui f(x)=px+q, f(-2)=8 dan f(1) =1 nilqi f(4)

Bab Fungsi

f(-2) = -2p + q = 8
f(1) = p + q = 1
______________ -
-3p = 7
p = -7/3

p + q = 1
-7/3 + q = 1
q = 3/3 + 7/3
q = 10/3

f(x) = -7/3 x + 10/3
f(x) = (-7x + 10)/3
f(4) = (-7(4) + 10)/3
f(4) = (-28 + 10)/3
f(4) = -18/3
f(4) = -6