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 y
-intercept. What is the average grade if a student was on social media for 0 hours?
The y-intercept in the equation represents the value of y (the average final grade) when x (the number of hours spent on social media) is equal to 0. In this case, the y-intercept is 98.9.
Therefore, if a student was on social media for 0 hours (x = 0), the average grade (y) would be 98.9.