(Activity continued on next page) Activity (continued from previous page) 4. Turn off Show least-squares fit line. Click New r, and sketch the scatter plot to the right. What is the value of r? Turn on Fit a line. Use the slope (m) and y-intercept (b) sliders to estimate the line that fits this data set best. Sketch your line and record its equation below. Equation of estimated line: Check your estimate by turning on Show least-squares fit line. Record the equation for the actual least-squares fit line. Least-squares fit line equation: Was your estimate close? _ 5. Turn off Show least-squares t line. Click New r several times. For each data set. try to fit the red line to the data, and then check it by turning on Show least-squares fit line. How does the value of r relate to how easy it is to estimate the least-squares fit line? 6. Three scatter plots are shown below. Use them to answer the questions below the graphs