Someone please help me out!

Which expression is equivalent to (9x - 3 1/ + 1 3/8)

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?

Aline passes through 3,7 and 6,9 what equation represents the line