The graph of function $f$ is shown below. 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 -). Use the given graph of $f$. If there is more than one answer to a question, you can use commas and the word “or”. When solving an equation for the variable $x$, your answer should be in the form “x=___”.