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, and the average final grade percentage, based on the hours. Using the equation of the trend line of the data, y equals negative 7.2 x plus 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 if a student spent 10 hours on social media, we can substitute x = 10 into the equation y = -7.2x + 98.9:
y = -7.2(10) + 98.9
y = -72 + 98.9
y = 26.9
Rounding this value to the nearest whole number, the predicted average final grade percentage for a student who spent 10 hours on social media is 27.
wrong
Apologies for the mistake. Let's correct the calculation:
Using the equation y = -7.2x + 98.9 and substituting x = 10:
y = -7.2(10) + 98.9
y = -72 + 98.9
y = 26.9
Rounded to the nearest whole number, the predicted average final grade percentage for a student who spent 10 hours on social media is 27%.