14
Chapter 1 | Functions and Graphs
Temperature (°F)
Temperature (°F)
Hours after Midnight
Hours after Midnight
0
58
12
84
1
54
13
85
2
53
14
85
3
52
15
83
4
52
16
82
5
55
17
80
6
60
18
77
7
64
19
74
8
72
20
69
9
75
21
65
10
78
22
60
11
80
23
58
Table 1.1 Temperature as a Function of Time of Day
We can see from the table that temperature is a function of time, and the temperature decreases, then increases, and then decreases again. However, we cannot get a clear picture of the behavior of the function without graphing it. Graphs Given a function f described by a table, we can provide a visual picture of the function in the form of a graph. Graphing the temperatures listed in Table1.1 can give us a better idea of their fluctuation throughout the day. Figure1.6 shows the plot of the temperature function.
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