Ms. keller is grading semester projects. in the past two hours, she has graded five projects. at this rate, she will grade _ project in seven hours at a rate of _ project per hour. fill in the blank

Noel is hoping to make a profit (in $) on the school play and has determined the function describing the profit to be f(t) = 8t – 2654, where t is the number of tickets sold. what does the number 8 tell you?