Cover 1000 is coming​

Ihonestly don’t understand this at all

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?

In the diagram below? p is circumscribed about quadrilateral abcd. what is the value of x