Question

which of the following best describes the graph below? a. it is a function, but it is not one - to - one. b. it is a many - to - one function. c. it is not a function. d. it is a one - to - one function.

Explanation:

Step1: Check if it's a function

Use the vertical line test: any vertical line drawn will intersect the graph at most once. This graph passes the test, so it is a function.

Step2: Check if it's one-to-one

Use the horizontal line test: any horizontal line drawn will intersect the graph at most once. This graph passes the test, meaning each output corresponds to exactly one input.

Answer:

D. It is a one-to-one function.