Question

Find f(-1), f(0) and f(4) for the following function.
f(x) = 2x

Answer 1

f(-1) = -2

f(0) = 0

f(4) = 8

Explanation:

f(x) = 2x

f(-1) = 2(-1)

=> -2

f(0) = 2(0)

=> 0

f(4) = 2(4)

=> 8