Question

Sendo f(-1)=5 e f(2)=-1, então f(0) é?
A) -2
B) 3
C) -3
D) 1
E) 0

Answer 1

Boa tarde

f(x) = ax + b

f(-1) = -a + b = 5
f(2) = 2a + b = -1

2a + a = -1 - 5
3a = -6
a = -2
2 + b = 5
b = 3

f(x) = -2x + 3

f(0) = 3 (B)