Use the image to answer the question.

Question

A scatterplot shows the number of hours studied versus test grade.
The horizontal axis shows the number of hours studied, ranging from 0 to 10 in increments of 1. The vertical axis shows the test grade, ranging from 0 to 100 in increments of 5, starting with a jump from 0 to 35. A kink is shown on the vertical axis close to origin. A dot is plotted at 0.5 on the horizontal axis and 45 on the vertical axis. A loosely packed cluster of data plots is plotted between 1 to 4.5 on the horizontal axis and 77 and 98 on the vertical axis.

A math teacher gave a math test. Interpret the scatterplot to determine which point is the outlier.

Answer 1

Based on your description of the scatterplot, it suggests that most of the data points cluster between 1 to 4.5 hours studied and correspond to test grades between 77 and 98.

The point at 0.5 hours studied and a test grade of 45 stands out as an outlier when considering the overall trend of the data. It is significantly lower in test grade compared to the other points which are more consistent and closer together in the higher range of test grades.

Therefore, the outlier in this scatterplot is the point at (0.5, 45).