50 points

the barker family just left the local pet store with lucky, their new family dog. the pet store owner told the barker family that for the next 6 months, lucky would grow at an average rate of 9 pounds per month. currently, lucky is 2 months old and weighs 3 pounds.

age, in months 2 3 4 5 6 7 8
weight, in pounds 3 12 21 30 39 48 57

create a linear model that represents the lucky's current weight, in pounds, as a function of his age, in months.