I need help to solve this equation. I'm stuck and confused

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? Ex: 1.234 ~ x+ Ex: 1.234 Patient 20 is 19 years old and has a systolic blood pressure of 124 mm Hg. What is the residual? Ex: 1.234 mm Hg Is the actual value above, below, or on the line? Pick What is the interpretation of the residual? Pick C