The table below shows the predicted annual cost for a middle income family to raise a child from birth until adulthood.

The results of the linear regression are:
y = ax + b
a = 510
b = 8750
r 2 = 0.9652399802
r = 0.9824662743
What is the equation of the line of best fit?
Describe what the linear regression data tells us
about the relationship between the variables in
the context of the problem.