Final answer:
The student is asked to use Microsoft Excel to perform regression analysis, find the least-squares regression line for a dataset, and interpret the significance of the data relationship.
Step-by-step explanation:
The question involves using regression analysis to define the relationship between two variables and determine the line of best fit. Specifically, it mentions using Microsoft Excel to plot least-squares regression lines, compare slopes, and assess the fit of the lines to the data. The steps typically involve entering the data points, creating a scatter plot, and using the regression function to find the least-squares regression line's equation. This statistical technique is used to understand the strength and direction of the relationship between dependent variables (e.g., fuel efficiency, textbook cost) and independent variables.
- Enter the data into the software to create a scatter plot.
- Apply the regression function to find the least-squares regression line's equation.
- Analyze the regression line to make further predictions or understand the data relationship's significance.