2points which of the following r-values represents the strongest correlation?

The sum of two numbers is 12 and their difference is 18 what are the two numbers

Lindsay used two points, (x,y; ) and (+2.82), to find the equation of the line, y = mx + b, that passes through the points. y2-y, first, she used the definition of slope and determined that the value of mis x, - . given this information, which expression must represent the value of b?

Having a hard time understanding this question (see attachment).