Question

State the domain and range and determine if it’s a function

Answer 1

Domain: 3, 6, 12, 18

Range: 5, 7, 9, 10

This is not a function.

Explanation:

In a function there is a single y value for each x value. In this case, when x = 6, y can be both 5 and 10. If you were to plot all these points and graph them, you would see that the result would fail the "vertical line test" for a function.