Question

Compute the exact value of the function for the given x-value without using a calculator.

f(x) = 5x for x = -1

a. 1/5
b. -1/5
c. 1/1
d. -5

Answer 1

D

`f(x) = 5x \: \: \: when \: x = - 1 \\ f( - 1) = 5( - 1) \\ f( - 1) = - 5`

Answer 2

d

Explanation:

Given

f(x) = 5x , then substitute x = - 1, that is

f(- 1) = 5 × - 1 = - 5 → d