Practice Exam

Question 7 • Algebraic Reasoning

Which function is a quadratic function?

Answer

k times x is equal to negative x

f of x is equal to 2 x squared

b times x is equal to negative 9 x to the 4th power

g of x is equal to 5 x cubed

A quadratic function has a highest exponent of 2. Choice B, f(x) = 2x², has degree 2, so it is quadratic. The other choices have degrees 1, 4, and 3.

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