Question

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.

Answer 1

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.