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.

Question

A The average final grade is 92% if a student spent 10 hours on social media.
B The average final grade is 92% if a student spent 10 hours on social media.

C The average final grade is 7.2 if a student spent 10 hours on social media.
DThe average final grade is 7.2 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 27% if a student spent 10 hours on social media.

The average final grade is 99% if a student spent 10 hours on social media.

Answer 1

The correct answer is not provided in the given choices. The correct answer is:

E The average final grade is 21% if a student spent 10 hours on social media.

Answer 2

are you sure

Answer 3

Apologies for the confusion. I made an error in my response.

Using the equation of the trend line, y = -7.2x + 98.9, we can substitute x = 10 to find the predicted average final grade percentage:

y = -7.2(10) + 98.9
y = -72 + 98.9
y = 26.9

Rounding to the nearest whole number, the predicted average final grade percentage if a student spent 10 hours on social media is 27%.

The correct answer is:

D The average final grade is 27% if a student spent 10 hours on social media.