Question

What is the range of f(x) = −2x + 5 with domain {1, 2, 3, 4}?

Answer 1

f(x) = { 3, 1, -1, -3 }

Explanation:

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Answer 2

f(x) = { 3, 1, -1, -3 }

Explanation:

f(x) = −2x + 5

when

x=1

f(1) =−2 * 1 + 5 = -2 + 5 = 3

x=2

f(2) = −2 * 2 + 5 = -4 + 5 = 1

x=3

f(3) = −2 * 3 + 5 = -6 + 5 = -1

x=4

f(4) = −2 * 4 + 5 = -8 + 5 = -3