Noel works as a driver for a transportation company. on average, he drives 152 hours to make 19 successful deliveries. assume this rate is his constant rate for delivering goods. if you graph this relationship with time along the x-axis and number of deliveries along the y-axis, the slope of the line you get gives noel's unit rate for a successful delivery. which unit rate can be interpreted as the slope? a. 8 deliveries per hour b. 2/17 of an hour per delivery c. 1/8 of a delivery per hour d. 1/8 of an hour per delivery