A scatterplot is used to display data for a runner where x is the number of miles run, and y is the time, in minutes, that it takes to run that distance. Which interpretation describes a line of best fit of y is equal to 9 point 5 x for the data in the scatterplot?
Answer
A
For each 9.5 minutes, the runner ran 1 mile.
B
The minimum distance with a recorded time is 9 point 5 miles.
C
For each 1 minute, the runner ran 9 point 5 miles.
D
The maximum distance with a recorded time is 9 point 5 miles.
Explanation
In y = 9.5x, the slope 9.5 means the time increases by 9.5 minutes for each additional mile. So the runner takes 9.5 minutes to run 1 mile, matching “For each 9.5 minutes, the runner ran 1 mile.”
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