Question

Suppose the line of best fit is being found for some data points that have an r-value of 0.769. If the standard deviation of the x-coordinates is 8.511, and the standard deviation of the y-coordinates is 5.508, what is the slope of the line to three decimal places?


A

. 2.009  
B. 1.188
C. 0.498  
D. 0.842

Answer 1

The slope can be found by the use of the following formula:m (slope) = r-value (standard deviation of the y-coordinates ÷ standard deviation of the x-coordinates)So we will havem = 0.769 (5.508 ÷ 8.511) ⇔ m = 0.498The slope of the line to three decimal places is 0.498.