Final answer:
To find the equation of a trend line when provided points, follow these steps: enter the data into a calculator and make a scatter plot, use the calculator's regression function to find the equation of the least-squares regression line, and graph the best-fit line.
Step-by-step explanation:
- Enter the data into a calculator and make a scatter plot.
- Use the calculator's regression function to find the equation of the least-squares regression line. Add this to your scatter plot from Part A.
- To graph the best-fit line, press the Y= key and type the equation -173.5+ 4.83X into equation Y1. (The X key is immediately left of the STAT key.) Press ZOOM 9 again to graph it.