Calculate the slope and intercept of the least-squares, Ask an Expert

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An article gave a scatterplot, along with the least-squares line for x = rainfall volume (in cubic meters) and y = runoff volume (in cubic meters), for a particular location. The following data were read from the plot in the paper:

x 8 15 17 20 26 33 43 50 58 70 75 84 99 115 130
y 6 12 15 17 17 27 29 48 40 48 55 72 84 101 102

(a) Calculate the slope and intercept of the least-squares line. (Give the answer to three decimal places.)

(b) Compute an estimate of the average runoff volume when rainfall volume is 75. (Give the answer to two decimal places.)

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Statistics and Probability, Statistics

Category:- Statistics and Probability
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