Final answer:
To find local extrema, you can use a graphing calculator or computer software such as the TI-83, TI-83+, and TI-84+. Graph the function and use the calculator's trace or minimum/maximum function to locate the local extrema.
Step-by-step explanation:
To find local extrema, you can use a graphing calculator or a computer software. One popular calculator for this purpose is the TI-83, TI-83+, and TI-84+. These calculators have built-in functions that can help you find local extrema. To use the calculator, you need to graph the function and then use the calculator's trace or minimum/maximum function to locate the local extrema. You can also use other online calculators or statistical software to find local extrema.