Draw the graphs of the function

and its second derivative on the closed interval **[-2, 4]**.

Using the TI-85 graphing calculator:

[Press here to see animation again!]

- If you are not familiar with the graphing of functions on the TI-85, then first read the Initial Setup page from Little's Basic Guide to the TI-85.
- Press the GRAPH key and then pick
**y(x)=**by pressing the F1 key. - If necessary, keep pressing F4 key until only
**y1=**appears on the screen. - At the prompt
**y1=**, type in**(x^3 + 1)**and press the ENTER key.

- At the prompt
**y2=**, type in**der2(y1,x,x)**and press the ENTER key.

You can enter**der2**by pressing 2nd CALC followed by the F4 key. - The range settings for the graph above is
**[-2, 4]**×**[-4, 8]**: - Press the F5 key to choose
**GRAPH**. The first graph drawn is the graph of**f(x)**: