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
05
0.25
os 1 1.5 2 253 25
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, 13w < 2
0.92, 2 1.13, 3 < W<3.5
M(w) =
0.50, 0 < W< 1
0.71, 1 0.92, 2 1.13, 3 Identify the error in each person's work and write a corrected set of rules.