Determine which variable is the independent variable and which is the dependent variable. Calculate the correlation coefficient r, and the equation of the regression line. Plot the points and the line on a scatterplot. Does the line provide a good description of the data?

21. Body Mass Index A study using body mass index (BMI)—an index of obesity—as a function of income ($ thousands) reported the following data for California in 2016

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Income 15 20.5 30 40 60 75 BMI 31.2 29.3 27.4 27.3 26.8 20.0