Kim's taco truck. Kim owns a food truck which she usually parks near NYU. Each day she must decide how many hours to work. Based on past experience, Kim estimates that the number of tacos sold is greater the greater the number of hours the truck is "open." Specifically, Table 5.7 shows the estimated relation.

TABLE 5.7 Kim's taco truck production function Number of hours Number of tacos 0 O 18.0 31.6 37.4 40.7 42.7 CO 00 V O U1 A W N - 44.2 45.2 46.0 46.1 10 46.1