Patient 7 is 67 years old and has a systolic blood pressure of 170 mm Hg. What is the residual?

mm Hg

The systolic blood pressure dataset (in the third sheet of the spreadsheet linked above) contains the systolic blood pressure and age of 30 randomly selected patients in a medical facility.

What is the equation for the least square regression line where the independent or predictor variable is age and the dependent or response variable is systolic blood pressure?

y^=x+