Question

The answer choices are either • the graph is a function • the graph is not a function

Answer 1

Idea: Use the vertical line test to determine whether or not a graph represents a function. If a vertical line is moved across the graph and, at any time, touches the graph at only one point, then the graph is a function. If the vertical line touches the graph at more than one point, then the graph is not a function

Graph 1 is not a function

Graphs 2 and 3 are functions