To compare proportional relationships represented in different ways, find the unit rate, or the constant of proportionality, for each representation.
The representations below show the rental cost per hour for canoes at three different shops.
Table
Graph
ty
Rental Cost ($) 18 127
80
Time (hr)
1
(3,75)
60
Rental Cost (5)
18
(2, 50)
Time (x)
36
36
36
0.5
0.75
40
Equation
C- 28t
36
54
125
27
36
Rental Cost (5)
To find the
unit cost,
determine
the value
of c when
20
4
12 3
Time (hr)