The information given in the problem situation specifies the cost in dollars for a phone call in terms of the length of the call in minutes. Foundations for functions. The student understands that a function represents a dependence of one quantity on another and can be described in a variety of ways. Clarifying Activity Students use cubes to construct buildings with towers. Students make a table relating the number of cubes in a tower to the total number of cubes used.
Students describe the pattern.
The total number of cubes is two more than the number of cubes in the tower. Often, several pamphlets are put into a box, and the box is mailed off. Represent the relationship between the number of pamphlets and the mailing weight of the box in at least three different ways. 20 expresses the mailing weight of the box in grams as a function of the number of pamphlets in the box. Foundations for functions.