Question

Fungsi h dinyatakan dg rumus h(x) = ax+b.
Jika h(5) = 16 dan h(4) = 11.Tentukan nilai h(-1)...!!

Answer 1

H(5)=16
5a + b = 16
H(4) = 11
4a + b = 11

A = 16-11
=5
Dan b ===> 4(5)+b= 11
B= -9

Maka, h(-1)
Ax+b
5(-1)+-9 = -14

Jd hasilnya -14

Answer 2

H(5) = 16
h(4) = 11
16 = 5a+b
b = 16-5a

11 = 4a+b
= 4a+(16-5a) (disubtitusikan)
= 16-a
a = 16-11
a = 5
4(a)+b=11
4(5)+b=11
20+b=11
b=-9

h(-1)=5(-1)+ -9
=-5-9
=-14