Suppose the variable x is the number of minutes walked each week and the variable y is the blood cholesterol level given by the following table:
x y
31 290
60 278
90 259
120 238
150 219
Using the regression equation, predict cholesterol levels when walking is 175 minutes per week.
There are different ways to find the regression line. Do you know which one you are supposed to use?
It should be around y=-0.6x+310.
Try to calculate the coefficients and we can check you answer. Do specify the method, and work details if you can.