Question

Determine whether each graph is the graph of a function.

Short answer

The vertical lines of graph (a) crosses the graph at two points. The graph (a) is not the graph of a function.

The vertical lines of graph (b) crosses the graph at only one point. So it is graph of a function .

Step-by-step solution

Given information 

Given the two graphs (a) and (b)

Vertical line test

Draw vertical lines on the graph . The vertical lines crosses the graph at two points. So graph (a) is not a function

Vertical lines of graph of (b) crosses the line graph at only one point. So graph (b) is a function .