21. Graph the following equations and explain why they are not
graphs of functions of x.
a. b.
22. Graph the following equations and explain why they are not
graphs of functions of x.
a. b.
Piecewise-Defined Functions
Graph the functions in Exercises 23–26.
23.
24.
25.
26.
27. Find a formula for each function graphed.
a. b.
t
y
0
2
4 1 2 3 x
y
0
1
2
(1, 1)
Gsxd = e
1
x
>
, 0
x, x 6
…
0
x
Fsxd = e
3
2x
-
,
x, x
x
…
7
1
1
gsxd = e
1
2
-
-
x
x
, 0
, 1
…
6
x
x
…
…
1
2
ƒsxd = e
x
2
, 0
- x, 1
…
6
x
x
…
…
1
2
ƒ x + y ƒ = 1 ƒ x ƒ + ƒ y ƒ = 1
y 2 = x2 ƒ y ƒ = x
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