Final answer:
Regression analysis is the process used to find the equation of a graph on a calculator. It involves creating a scatter plot, using the calculator's regression function to find the least-squares regression line, and then analyzing the correlation coefficient to understand the relationship between variables. The correct answer is b) Regression analysis.
Step-by-step explanation:
The process used to find the equation of a graph using a calculator is known as regression analysis. Here are the steps usually followed to perform regression analysis:
- Enter the data into the calculator and create a scatter plot to visually represent the relationship between the variables.
- Identify which of the variables is the independent variable and which is the dependent variable for the analysis.
- Access the calculator's regression function to calculate the least-squares regression line, which is the line that best fits your data set.
- The calculator will provide an equation in the form ý = a + bx, where 'a' represents the y-intercept and 'b' represents the slope of the line.
- Examine the significance of the correlation coefficient provided by the calculator to understand the strength and direction of the linear relationship.
This regression line can then be added to your scatter plot to visualize the relationship between the variables.