Question

Find the range of f(x) = –x + 4 for the domain {–3, –2, –1, 1}.

Answer 1

{3, 5, 6, 7}

Explanation:

Plug in each number form the domain and solve for f(x). The set of f(x) values is the range.

f(x) = -x + 4

f(-3) = -(-3) + 4 = 7

f(-2) = -(-2) + 4 = 6

f(-1) = -(-1) + 4 = 5

f(1) = -1 + 4 = 3

Range: {3, 5, 6, 7}