Finding the function of y=-2/3x +2

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?

Maria walks a round trip of 0.75 mile to school every day. how many miles will she walk in 4.5 days

If you could answer these your a life saver