Equivalent expressions of functions Partial pictures Each figure below shows the graph of a linear function. Because of the choice of scale, one or both points where the graph intersects the axes are not visible. Use the information in each graph to determine the linear function that the graph describes. Construct a correspondence rule. Use the correspondence rules you constructed to find out the intersection points that are not visible in the figure. Construct new correspondence rules for the functions, which emphasize the information about the hidden points you found. 3 2 1

The form f(x)=ax+b The form f(x)=a(x-c) The form f(x)=a(x-c)+m Emphasizing information Emphasizing intersections Families of functions Features from value tables Partial pictures Equivalent recipes Telephone rates Verbal descriptions of equivalent expressions Stories Describing a trip Speeding car Exercise 1 Exercise 2 Exercise 3 Exercise 4 Exercise 5 Exercise 6 Exercise 7 Exercise 8 Exercise 9 Exercise 10 Exercise 11 Exercise 12 Exercise 13 Exercise 14 Exercise 15 Exercise 16 Exercise 17 Exercise 18 Exercise 19