Question

Which relation is a function? (look at image below)

Answer 1

Bottom Right Graph (Absolute Value)

General Formulas and Concepts:

• Vertical Line Test

Explanation:

When we apply the VLT to the 4 different graphs, we see that the only graph that actually passes the VLT is the absolute value graph. Therefore, that is our answer (none of the other graphs pass the VLT).