Find the value of x, one side is 14, another is 48

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?

Could someone me with this question i’ve been stuck on it for 20 minutes

Which of the following represents a function? 50 !