Find a whole number that, when added to the data set below, does not change the interquartile range.
30, 32, 34, 34, 37, 38, 40, 43

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?