Question

Determine whether each graph is the graph of a function.

Short answer

The graph (a) does not pass vertical line test. The graph (a) is not a graph of a function.

The graph (b) passes vertical line test. So it is a function .

Step-by-step solution

Given information 

The graph of two functions are given

Vertical line test

Draw vertical lines on each graph . In part(a) graph , vertical lines passes through graph at two points . So it is not a function .

Draw vertical line in part(b) graph , The vertical lies passes at only one point. so it is a function.