Question

Yg nomor lima tolong bantuanya yah pliss ka

Answer 1

A). f(3) = 1
a(3) + b = 1
3a + b = 1

f(1) = -1
a(1) + b = -1
a + b = -1

Eliminasi:
3a + b = 1
a + b = -1
------------ (-)
2a = 2
a = 1
b = -2

b). f(x) = x - 2

c). f(-2) = x - 2
f(-2) = -2 - 2
f(-2) = -4