Question

Use the vertical line test to determine whether the relation is a function {(0,-1),(-5,1),(-3,-3),(-5,-5)}

Answer 1

This relation is not a function

Explanation:

Each x value has to have a different y value. The second and 4th point have an x value of -5, but they have 2 different y-values, so that means there are 2 points here. This fails the vertical line test, so this relation is not a function