Using the given data you can build the linear regression (described by linear function y=ax+b) by hand or you can use math calculator to do this. In attached diagram you can see that

and

Then the equation of linear function is

Answer: correct choice is D.
Answer: $38
Step-by-step explanation:
you have add 20 & 18 which would give you 38
Since 4>1, this represents exponential growth.
y>3x+6
y>4/3x-5 <- (The sign is greater than or equal to btw)