Question

Your teacher made 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 not working on it?

Answer 1

The slope of the trend line is -7.2. This means that for every one additional hour spent working on the final grade, the average final grade decreases by 7.2 points.