A.4.12.2 Postage Stamps
- Author:
- Katie Akesson
The relationship between the postage rate and the weight of a letter can be defined by a
piecewise function.
The graph shows the 2018 postage rates for using regular service to mail a letter.
1. What is the price of a letter that has the following weight?
a. 1 ounce
b. 1.1 ounces
c. 0.9 ounce
2. A letter costs $0.92 to mail. How much did the letter weigh?
Kiran and Mai wrote some rules to represent the postage function, but each of them made some errors.
Identify the error in each person’s work and write a corrected set of rules.
How do we know whether to use or by looking at the graph?
By looking at the graph, how can you tell how many cases should be included in the equation?