Cumulative Exam — Cumulative exam

Question 10 • MISD CR Algebraic Reasoning B

Which function is a quadratic function?

Answer

t(x) = (x – 4)2 + 3

q(x) = (2x + 4)3 + 3

r(x) = (–6x – 4)4 + 3(x + 2)2

s(x) = –(x – 6) + 3(x + 1)

Explanation

A quadratic function has a highest power of x equal to 2. In choice A, (x − 4)² + 3 has degree 2, so it is quadratic. Choice B has degree 3, choice C has degree 4, and choice D is linear.

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