We will have the following:
19. All the values in the table are correct.
Also, x = -2 means that there is a line at x = -2.
20. We graph the line:
21. The line is vertical.
22. An equation for vertical lines has the form:
and is parallel to the x-axis.
23. The reason is that all the images will have an x-component equal to 0. Thus, the y-axis would be the line depicted.
Look for example at the graph of problem 20, all the x-components are kept at -2, and the only values that change are the y-components. Now, if we were to plot a vertical line in the y-axis, the x-component is x = 0, and the y-components are the ones that change. This is: