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Domain, Range, Functions

Which of the following set of ordered pairs is

a function?

 {(-1, 1), (0, 3), (2, 7), (3, 9)}

 {(0, 1), (1, 3), (2, 7), (1, -2)}

 {(-1, 3), (0, 3), (-2, 5), (-1, 1)}

 {(2, 1), (2, 2), (2, 3), (2, 4)}
Which table represents a function?
-4
3
5

5

9
x
x
3
3
2
1

1

2

2

y
10
12
10
15
y

7

6
3
5
9
3
5
6
x
x
12
12
10
y
1
2
2
6

3

y

       f(x) = 3x2 - 2x + 5

 

What is the value of f(5)?

 70

 30

 10

  6
Which of the following is not the graph of a function?
Altres proves d'interés :
Hsa patterns and functions 1
Exponent laws mini-quiz
Domain, range and functions problem set #2
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