The following graphs show two relationships. If you would like to enlarge the graph or make numbers and letters easier to read, you may click on it to open it in a new window. You may then enlarge that window with your mouse. To further enlarge the image, use your browser’s zoom capabilities. On a PC this is usually ctrl shift + (and zooming out is ctrl -). On an Apple computer this is usually apple shift + (and zooming out is apple -). Decide whether each graph shows a relationship where $y$ is a function of $x$. Does the relationship in Graph 1 show $y$ as a function of $x$?
A. Yes
B. No
Does the relationship in Graph 2 show $y$ as a function of $x$?
A. Yes
B. No