Question 7: Data showing the number of people in 9 households against weekly grocery costs are given below. Number of people in household Weekly grocery costs ($) 2 5 6 C. 60 180 210 3 120 a. Calculate the correlation coefficient (r) for the data. 4 b. Calculate the coefficient of determination (r²) for the data. 150 160 5 Interpret the value of the coefficient of determination. 6 2 65 3 200 90

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