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, x, and the average final grade percentage, y, based on the hours. Using the equation of the trend line of the data, 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 of the equation, y=–7.2x+98.9, is 98.9. This means that if a student spent 0 hours on social media (x=0), their average final grade percentage, y, would be 98.9%. This indicates that spending no time on social media is associated with the highest average grade in the class.
