If the coefficient of determination between two variables is .81, what is the pearson correlation coefficient?

The coefficient of determination is a distinct output of linear regression analysis. This is usually interpreted as the proportion or fraction of the variance in the dependent variable that can be predicted from the independent variable. This is a measure of how close the data are when fitted in a linear equation or regression line. This is represented by the variable “r^2”.

While the pearson correlation is a direct measure of the closeness and direction of association that occurs between the independent and dependent variable. This is represented by the variable “r”.

As you can see from the variables, we can simply get pearson correlation by taking the square root of the coefficient of determination, hence:

person correlation = sqrt (0.81) = 0.90

to find the perimeter of the rectangle this is the expression:

x-9+x-9+3x-4+3x-4=138

if we simplify it:

8x-26=138

remember, 138 is what it all adds up to

the length is 11.5cm

the width is 57.5cm

the area is 661.25cm^2

the answers might not be correct use at own risk