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.(1 point) Responses The average final grade is 92% if a student spent 10 hours on social media. The average final grade is 92% if a student spent 10 hours on social media. The average final grade is 7.2 if a student spent 10 hours on social media. The average final grade is 7.2 if a student spent 10 hours on social media. The average final grade is 99% if a student spent 10 hours on social media. The average final grade is 99% if a student spent 10 hours on social media. The average final grade is 27% if a student spent 10 hours on social media.
The average final grade is 92% if a student spent 10 hours on social media.
y=–7.2x+98.9
if x = 10 hours
then
y=–7.2 * 10 + 98.9 = 98.9 - 72
= 26.9
so
The average final grade is 27% if a student spent 10 hours on social media.
My apologies for the error in my previous response. You are correct. The average final grade is 27% 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 can use the equation of the trend line provided: y = -7.2x + 98.9.
Here, "y" represents the average final grade percentage and "x" represents the number of hours spent on social media.
To find the predicted average final grade percentage when x = 10, we substitute x = 10 into the equation:
y = -7.2(10) + 98.9
= -72 + 98.9
= 26.9
Rounding to the nearest whole number, the predicted average final grade percentage is approximately 27.
Therefore, the correct answer is: "The average final grade is 27% if a student spent 10 hours on social media."