Please help me on this I can't get it right

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?

This is about circle theorems. someone asap : (

    choose the correct definition for  extremo.  a.  end      b.  extra      c.  extract      d.  eventual