4.1 Review Worksheet (continued)
4.1.2 Relations and Functions Express each relation as a table, as a graph, and as a mapping diagram. 8. {( − 2, − 4), ( − 1, − 1), (0, 0), (1, − 1), (2, − 4)}
⎧ ⎨ ⎩
⎫ ⎬ ⎭
⎛ ⎝ ⎜
⎞ ⎠ ⎟
⎛ ⎝ ⎜
⎞ ⎠ ⎟
1 2
1 2
9. ( )
( ) , 2, 2 , 2, 2
2,1 , 2,
Give the domain and range of each relation.
10.
11.
y
x y 4 4 5 5 6 6 7 7 8 8
4
2
x
0
2
4
Give the domain and range of each relation. Tell whether the relation is a function. Explain.
12.
13.
y
2
x
–2
2
–2
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