Please help with this Patterns & Expressions table. I have been stuck on this for hours. Basically I need to find the comman process or function to get the displayed output. please help.

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?