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?(1 point)
The y-intercept of the trend line equation, y = −7.2x + 98.9, represents the average grade when the number of hours spent on social media is 0.
In this case, if a student was on social media for 0 hours, the average grade would be the y-intercept, which is 98.9.