II. Setting Windows and Styles

B. Examples

4. Exponential Functions

When you enter functions that involve exponents, it is important that you put parentheses around the exponent.

i) Example: Graph the function shown. ZoomDec does not give a good graph, but a look at the table indicates that ZoomStd will be a good window to use.

Enter the function.
Use ZoomDec.
Go to TABLE.
Use ZoomStd.

ii) Example: Graph the function shown. You can see that ZoomDec does not show very much of the graph, but ZoomStd gives a good view. Notice that the domain of the function is x>2.

Enter the function.
Use ZoomDec.
Use ZoomStd.

iii) Example: Graph the function shown. Instead of using the TABLE to find a window, we will use TRACE to determine a proper viewing window. You can see that the y-values are quite small, and the window will need to reflect that.

Enter the function.
Start with ZoomDec
and use TRACE, ,
to find values.
Use these values
to set the window.
Check negative
values.
Set the window.
Graph the function.