Question

O GRAPHS AND FUNCTIONSVertical line testFor each graph below, state whether it represents a function.Graph 1Graph 2Graph 34Function?Yes ΟΝΟGraph 4Yes O NoGraph 5Yes ΟΝΟGraph 6YesFunction?NOYesNOYesNOх?

Answer 1

For a relation to be a function, use the Vertical Line Test:

Draw a vertical line anywhere on the graph, and if it never hits the graph more than once, it is a function. If your vertical line hits twice or more, it's not a function.

So, look at the graphs:

Graph 1: Not a function

Graph 2: Not a function

Graph 3: Not a function

Graph 4: IS a function

Graph 5: IS a function

Graph 6: Not a function