2. A school secretary is buying pencils. The pencils come in boxes of \( 10 \) . Sketch a graph to show the number of pencils the secretary could buy if she has enough money to buy \( 1,2,3 , \) or \( 4 \) boxes. Tell whether the graph is continuous or discrete.
Joe earns \( \$ 9 \) per hour. He worked \( x \) hours on both Wednesday and Friday, and \( 8 \) hours on both Tuesday and Saturday. Write an expression to represent how much Joe earned.