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George is studying how the amount of sleep affects test performance for the 21 students in his 8AM history class. The scatterplot above shows the hours of sleep the night prior to and the scores received on the history midterm for each student. The line of best for the data is also shown. For the student who slept for 7 hours, the student’s actual score was about how many points more than the score predicted by the line of best fit?
The scatterplot above shows the relationship between weekly hours of exercise, x, and weight lost per week, y. According to the graph and parabola of best fit, how many hours per week should someone exercise to likely lose the most weight.
The figure below shows the relationship between the percent of budget deficit remaining after 20 years and the mean annual income of the residents, in thousands of dollars, in 16 cities in the United States. A line of best fit is also shown.
The residents of a particular city in the United States, whose data is not shown in the figure, had a mean annual income of 38 thousand dollars. Based on the line of best fit, which of the following is closest to the predicted percent of budget deficit remaining in this particular city after 20 years?
Which of the following equations best models the data in the scatterplot?