Question

Evaluate the range, f(x), of each function when given the domain.

1. Evaluate f(x) = 3x +4 when x = -1



2. Evaluate f(x) = -2x - 7 when x = 6

Answer 1

1. 1

2. -19

Explanation:

f(x) = 3x + 4 when x = -1

Switch out x for -1 and solve

= 3(-1) + 4

= -3 + 4

= 1

f(x) = -2x - 7 when x = 6

Switch out x for 6 and solve

= -2(6) - 7

= -12 - 7 or -12 + -7

= -19