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.
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.
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.
are you sure
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.
To predict the average final grade percentage if a student spent 10 hours on social media, we can substitute the value of x = 10 into the equation y = -7.2x + 98.9.
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 is 27.
Therefore, the correct answer is:
The average final grade is 27% if a student spent 10 hours on social media.
To predict the average final grade percentage if a student spent 10 hours on social media using the given equation, we can substitute the value of x (10) into the equation and solve for y.
Using the equation y = -7.2x + 98.9:
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 for a student who spent 10 hours on social media is 27%.
Therefore, the correct answer is:
The average final grade is 27% if a student spent 10 hours on social media.