Question

Does the graph represent a function and if so, why?

Answer 1

No

Explanation:

Definition of a function is: a relation from a set of inputs to a set of possible outputs where each input is related to exactly one output

Here we have more than one output for one input:

• x=-1 => y= -1, 0, 1
• x= 1 => y= 1, 2, 3

So this is not a function