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 = -7.2 x + 98.9. Interpret the slope. How many points does the average final grade decrease for 1 hour on social media

Answer 1

The slope of the trend line, -7.2, represents how much the average final grade decreases for every one unit increase in the number of hours spent on social media.

In this case, the unit is 1 hour. Therefore, for every additional hour spent on social media, the average final grade decreases by 7.2 points.