A representation that is most appropriate for the relationship between the data points is shown in the image below.
A scatter plot is a type of graph which is used for the graphical representation of the values of two variables, with the resulting points showing any association (correlation) between the data set.
In this exercise, we would plot the age (in years) on the x-axis of a scatter plot while the hair length (in fluid inches) would be plotted on the y-coordinate of the scatter plot through the use of a graphing calculator.
Based on the table of values, we can logically deduce that the line must visibly pass through the points (12, 8), (14, 6), (15, 9), (15, 13), (16, 7), (18, 10), (19, 4), (20, 7), and (20, 13) as correctly depicted by the graph shown below.