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
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.
The slope of the trend line, which is -7.2 in this case, represents the rate of change of the average final grade with respect to the number of hours spent on social media.
Interpreting the slope, we can say that for every one-hour increase in the time spent on social media, the average final grade decreases by 7.2 points.