with parameter a, draw the graphs for the parameters a = 0, 1, ..., 4.

1. Prepare the program for graphics.
2. If the first menu item is Algebra then press .
3. Press for Author.
4. Enter the family of functions vector(abs(2 a - x), a, 0, 4)
5. Press to Expand the expression.
6. Press twice to get the graph.
7. If necessary, we will need to zoom in or out to get a good view of the graphs. To zoom in or out, press .
8. We are now given the choice whether to zoom in or out and whether to do this just on the x-axis, y-axis or both. Use the spacebar to choose among the latter three options. Press to make a choice between zooming in or out. Again, pressing lets you pick one of these two choices.
9. Press .
10. Repeat the previous three steps if necessary.