Mellissa plotted the graph of a function. The function contains the points and . The domain of the function is all whole numbers. Mr. Wilson reviewed her work and said that the graph is incorrect. Explain why this graph is incorrect.

Draw a correct graph.

What is the value of  y  in the solution to the system of equations? x  +  y  =  12x  –  3y  =  –30a. –8b. –3c. 3d. 8

1. during first 10 seconds 2. between 10 seconds and 35 seconds 3. during 35 seconds to 40 seconds

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?