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 based on the hours. The trend line (equation) for the data is y=−7.2x+98.9

Question

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 based on the hours. The trend line (equation) for the data is  y=−7.2x+98.9
 . Interpret the slope. How many points does the average final grade decrease for 1 hour on social media?(1 point)

GPT-4o mini · Answer

In the equation of the trend line $ y = -7.2x + 98.9 $, the variable $ y $ represents the average final grade, and $ x $ represents the number of hours spent on social media. The slope of the trend line is $-7.2$. This means that for each additional hour spent on social media, the average final grade decreases by 7.2 points. In summary, the average final grade decreases by **7.2 points** for each additional hour spent on social media.