How do you solve?

A medical student at a community college in city Q wants to study the factors affecting the systolic blood pressure of a person ?(?Y). ?Generally, the systolic blood pressure depends on the BMI of a person ?(?B) and the age of the person A. She wants to test whether or not the BMI has a significant effect on the systolic blood? pressure, keeping the age of the person constant. For her? study, she collects a random sample of 150 patients from the city and estimates the following regression? function:

Y = 15.50 + 1.558 + 1.15A. (0.48) 0.35VS. H