Answer :
Final answer:
The line plot represents the data set {145, 165, 175, 185}.
Explanation:
The data set represented in the line plot is: {145, 165, 175, 185}.
In the line plot, there is 1 dot over 145 indicating that 1 runner had a pulse rate of 145 after finishing the marathon; there are 5 dots over 165 indicating that 5 runners had a pulse rate of 165; there are 6 dots over 175 indicating that 6 runners had a pulse rate of 175; and there is 1 dot over 185 indicating that 1 runner had a pulse rate of 185.
Therefore, the correct data set is {145, 165, 175, 185}.
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