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:
1 1/3
Step-by-step explanation:
m = y2-y1 over x2-x1
Step-by-step explanation:
A number that is negative is less than 0, so



So this function is negative, when x is less than -2