A marathon runner is interested in split times, which is
the time to complete the first half of the race and the
second half of the race. She collects split times for 10
runners and summarizes the data in the table.
First-Half Time
(Minutes)
Second-Half
Time
(Minutes)
The equation of the least-squares regression line is
ý = -51.0+ 1.44x, where y is the time (in minutes) to
finish the second half of the race and x is the time (in
minutes) to finish the first half. Which shows the
residual plot?