Which of the following graphs is not a function?

click on the graph until the correct graph appears.

The correct answer to this question is choice c: y>0. First, it is important to understand that absolute value is another way to say the positive version of something. For example, the absolute value of -6 is 6 and the absolute value of 2 is just 2. Therefore, we know all the y-values of the parent absolute value function must be positive, therefore choice c is correct.

I hope this helps.