Answer the following questions about functions.

Question

A series of points in the form (x,y) is a function if every _____-value is different.

A graph is a function if a vertical line passes through the graph at most _____ time.

Answer 1

A series of points in the form (x,y) is a function if every x-value is different.
A graph is a function if a vertical line passes through the graph at most one time.