An equation of the line of best fit shown in the scatter plot is y=9/2x+22. What does 22 mean in this model?

A) The y-intercept, 22, means that on average, babies grow about 22 inches in the first 5 years

B) The y-intercept, 22, means that on average, babies are 22 inches length when born

C) The y-intercept, 22, means that on average, two years old are 22 inches tall.

D) The y-intercept, 22, means that on average, babies will grow about 22 inches in the first 2 years.