Representations of linear functions Trucks At 6 am, George left the port driving a truckfull of imported goods to a city 600 kilometers away. At the same time, Ricky left the city for the port, driving an empty truck. The supervisor at the port asked Ricky to give George some documents when they meet along the way. f1 f2 f3 f4 distance from port (kms) time (hours) Five points are marked on the graphs. Describe the meaning of each of these points in terms of the story, and note further information about the story that can be learned from reading the coordinates of these points. What are the speeds of the two trucks? Construct correspondence rules for the two graphs. Discuss the meaning of the numbers that appear in the corespondence rules in terms of the story. When George reached the city, the truck was unloaded. An hour later, Al drove the truck back to the port. Ricky's truck reached the port, was loaded with cargo, and two hours later started back for the city. Add graphs to describe these trips. Propose questions that can be answered using the new graphs.

At the gas station Different prices Cab fares Changing grades Fuel efficiency Postal rates Inverse machines Trucks Medical prescriptions Height and bone lengths Dividing a budget Electric bill Constructing functions Exercise 1 Exercise 2 Exercise 3 Exercise 4 Exercise 5