Question

Which relation is a function?

Answer 1

The bottom one on the right is a function.

Explanation:

Its the bottom one on the right because it is the only one which passes the vertical line test for a function.

This test states that if we draw any vertical line through the graph and it only passes through the graph at one point only then the graph is a function.

Answer 2

the one that looks like a V

1. take a ruler

2.move it across the graph

3.see if it crosses twice

ex:if it is a straight line than it wont work if it is like a V shape it will work