The first step in solving the exercise is to identify which is the dependent variable and which is the independent variable.
The independent variable will go on the x-axis and the dependent variable will go on the y-axis.
The independent variable is age because the time of runners depends on their age, not the other way around.
Then, age is on the x-axis and time is on the y-axis, which rules out option A.
Now, you can discard option D. because, for example, the ordered pair (12, 23) is not graphed.
Finally, you can discard option C. because, for example, the ordered pair (71,33) is not graphed.
Therefore, the scatter plot that accurately reflects the data in the table is that of option B.
