Ascientist created a scatter plot to represent the heights of four plants over time. then, she found a line of best-fit to model the height in centimeters of each plant after x days. the equations of each trend line are given in the table.

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?