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 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?
The slope of the line is the coefficient of the x-variable, which in this case represents the number of hours spent on social media. The slope is -7.2.
Interpreting the slope, it means that for each additional hour spent on social media, the average final grade decreases by 7.2 points.