Given the least squares regression line ,and a coefficient of determination of 0.81,the coefficient of correlation is:

A) −0.66
B) 0.81
C) −0.90
D) 0.90

Least Squares Regression

A method to estimate the coefficients of a regression line by minimizing the sum of the squares of the differences between observed and predicted values.

Coefficient of Determination

A statistical measure that determines the proportion of variance in the dependent variable predictable from the independent variable(s).

Coefficient of Correlation

This is a statistical measure that calculates the strength and direction of the relationship between two continuous variables.