A scatterplot shows the number of hours studied for a test (x) versus the score received on the test (y). A line of best fit is drawn, as shown in the figure. If the slope of this line of best fit is 7.5, which of the following is the best interpretation of this slope in the context of the problem?
For every 7.5 hours studied, the test score increases by 1 point.
For every 1 hour studied, the test score increases by 7.5 points.
A student who studies 7.5 hours is expected to score 1 point.
A student who studies 1 hour is expected to score 7.5 points.
