Here are the 40-yard-dash times (in seconds) and longjump distances (in inches) for a small class of 12 students:

a. Sketch a scatterplot of the data using dash time as the explanatory variable.

b. Use technology to calculate the equation of the least-squares regression line for predicting the long-jump distance based on the dash time. Add the line to the scatterplot from part (a).

c. Explain why the line calculated in part (b) is called the “leastsquares” regression line.

Transcribed Image Text:

Dash time (sec) 5.41 5.05 7.01 7.17 6.73 5.68 Long-jump distance (in.) 171 184 90 65 78 130 Dash time (sec) 5.78 6.31 6.44 6.50 6.80 7.25 Long-jump distance (in.) 173 143 92 139 120 110