To find the equation of a regression line, ŷ = ax + b, you need these formulas:
a = r Sy/Sx b = y-ax
A data set has an r-value of 0.553. If the standard deviation of the x- coordinates is 3.996, and the standard deviation of the y-coordinates is 6.203, what is the slope of the line to three decimal places?
A. 2.807
B. 0.356
C. 1.165
D. 0.858