Question

Your teacher surveyed the class to determine the number of hours that each student spent on social media. Your teacher created a table and scatterplot graph that displayed the number of hours and the average final grade based on the hours. The trend line (equation) for the data is y=−7.2x+98.9
. Interpret the slope. How many points does the average final grade decrease for 1 hour on social media?

Answer 1

The slope is −7.2, which means for each additional hour spent on social media the average final grade falls by 7.2 points (≈7.2 percentage points).