Using Trend Lines Practice

Question

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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)

Answer 1

The slope of the trend line, which is -7.2 in the equation \( y = -7.2x + 98.9 \), represents the change in the average final grade for each additional hour spent on social media.

Since the slope is negative (-7.2), this indicates that for each additional hour spent on social media, the average final grade decreases by 7.2 points.

So, the average final grade decreases by 7.2 points for every 1 hour spent on social media.