Use the vertical line test to determine if the following graph is the graph of a function.
A) function
B) not a function

Question

Use the vertical line test to determine if the following graph is the graph of a function. 
A) function 
B) not a function

Quizplus · Accepted Answer

The vertical line test is a visual way to determine if a relation is a function. If any vertical line intersects the graph at more than one point, then the relation is not a function. In this graph, there are vertical lines that intersect the graph at multiple points, specifically at x = 1 and x = 3, indicating that there are multiple outputs (y-values) for those inputs (x-values). Therefore, the graph is not a function.

Use the Vertical Line Test to Determine If the Following