So a researcher is interested in finding out the factors which determined the yearly spending on family outings last year ?

(?Y, measured in? dollars). She compiles data on the number of members in a family ?(X₁?), the annual income of the family ?(X₂?), and the number of times the family went out on an outing in the last year ?(X₃?). She collects data from 152 families and estimates the following? regression: