Question

Which statement best describes the function below? f(x)=2x^3+2x^2-x A. It is not a function. B. It is a many-to-one function. C. It is a one-to-one function. D.It fails the vertical line test.

Answer 1

B

Explanation:

Answer 2

A plot of the function shows that
(a) It is a cubic polynomial, with zeros at x = 0, -1.366, and 0.366
(b) It passes the vertical line test.

Therefore the function is a one-to-one function.

Answer: C