Question

Do any of the graphs fail the vertical line test? If so, which one?

Answer 1

Vertical lines drawn on the four graphs would touch the graphs at only one point. So, none of the graphs fails the vertical line test.

Answer 2

None of them fail the vertical line test.

Explanation:

Since each x-value has it's own y-value, they pass the vertical line test. The only time a graph fails the vertical line test is when an x-value has 2 y-values.