15 1.25
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
postage (dollars)
0.75
0.5
0.25
05
i 15 2 25 3 3.5
weight (ounces)
Kiran and Mai wrote some rules to represent the postage function, but each of them made some errors.
Kiran
Mai
K(W) =
0.50, 0 0.71, 1 0.92, 2 1.13, 3 M(w) =
0.50, 0 0.71, 1 0.92, 2 1.13, 3 Identify the error in each person's work and write a corrected set of rules.