Fungsi f(x)=ax+b, jika f(2)=-2, dan f(-3)=13 maka nilai f(4) adalah

Jawaban:

f(2) = ax + b = -2

a(2) + b = -2

2a + b = -2

f(-3) = ax + b = 13

a(-3) + b = 13

-3a + b = 13

2a + b = -2

-3a + b = 13

—————— –

5a = -15

a = -15/5

a = -3

2a + b = -2

2(-3) + b = -2

-6 + b = -2

b = -2 + 6

b = 4

maka

f(4) = ax + b

= -3 (4) + 4

= -12 + 4

= -8

fungsi f(x)=ax+b, jika f(2)=-2, dan f(-3)=13 maka nilai f(4) adalah

A. -10

B. -8

C. -6

D. -4