Question

Which of the following best describes the graph below?

N+
5
-4
-3 -2 -1
1
- 1
3
-2
-3
O A. It is a function, but it is not one-to-one.
B. It is a one-to-one function.
O C. It is not a function.
OD. It is a many-to-one function.

Answer 1

C. it is not a function

Explanation:

It fails the horizontal and vertical line test.

To pass the horizontal line test [injective]: must not hit a horizontal line passing through more than once.

To pass the vertical line test [function]: must not hit a vertical line passing through more than once.