A mother gives birth to a 9 pound baby. Every 4 months, the

Last updated: 7/21/2022

A mother gives birth to a 9 pound baby. Every 4 months, the baby gains 3 pounds. If z is the age of the baby in months, then y is the weight of the baby in pounds. Find an equation of a line in the form y=mx+b that describes the baby's weight.