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 hour
The y-intercept in the equation y = -7.2x + 98.9 represents the value of y (average final grade) when x (number of hours spent on social media) is 0.
In this case, if a student was on social media for 0 hours, the average final grade would be 98.9.