What is the volume of the prism 3,7,3

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?

How can writing phrases as algebraic expressions you solve problems?

Write the equation in general quadratic form: plz !