12
AssignmentMultiple Choice

Absolute Value Functions

Question 12 • Common Core Algebra I B-IC

Given the function f(x) = –0.5|2x + 2| + 1, for what values of x is f(x) = 6?

Answer
A
x = 6, x = –5
B
x = 5, x = –5
C
x = 7, x = –6
D
no solution

Explanation

Because an absolute value is always nonnegative, |2x + 2| ≥ 0. Multiplying it by −0.5 gives a value that is at most 0, so f(x) = −0.5|2x + 2| + 1 can never be greater than 1. Therefore it cannot equal 6, and the correct choice is “no solution.”

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