your teacher surveyed the class to determine the number of hours that each student spend on social media. your teach created a table and scatterplot graph that displayed the number of hours and the average final grade based in 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?
In this context, the y-intercept of the trend line represents the average final grade of a student who spends 0 hours on social media. According to the equation y = -7.2x + 98.9, where x is the number of hours spent on social media, when x = 0, the equation becomes y = -7.2(0) + 98.9. Simplifying this equation yields y = 98.9.
Therefore, if a student spends 0 hours on social media, the average final grade is 98.9.