Given the family of functions

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

Using Derive,

- Prepare the program for graphics.
- If the first menu item is
*Algebra*then press . - Press for
*Author*. - Enter the family of functions
vector(abs(2 a - x), a, 0, 4) - Press to
**Expand**the expression. - Press twice to get the graph.
- If necessary, we will need to zoom in or out to get a good view of the graphs. To zoom in or out, press .
- 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. - Press .
- Repeat the previous three steps if necessary.