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, predict the average final grade percentage, to the nearest whole number, if a student spent 10 hours on social media.
To predict the average final grade percentage for a student who spent 10 hours on social media, we need to substitute x = 10 into the equation of the trend line and solve for y:
y = -7.2(10) + 98.9
y = -72 + 98.9
y = 26.9
Therefore, the predicted average final grade percentage for a student who spent 10 hours on social media is 27%.