RELATIONS & FUNCTIONS Worksheet, Study notes of Calculus

RELATIONS & FUNCTIONS Worksheet. 1. Using the vertical line test, determine if the graph above shows a relation, a function, both a relation and a.

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RELATIONS & FUNCTIONS Worksheet
1.
Using the vertical line test, determine if the graph above shows a relation, a function, both a relation and a
function, or neither a relation nor a function.
A.
neither a relation nor a function
B.
relation only
C.
both a relation and a function
D.
function only
2. Which of these graphs represents a function?
W.
pf3
pf4
pf5
pf8
pf9
pfa
pfd
pfe
pff
pf12
pf13

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RELATIONS & FUNCTIONS Worksheet

Using the vertical line test, determine if the graph above shows a relation, a function, both a relation and a function, or neither a relation nor a function.

A. neither a relation nor a function B. relation only C. both a relation and a function D. function only

2. Which of these graphs represents a function?

W. X.

Y. Z.

A. Z

B. X

C. W

D. Y

3. Which of these t-tables represents a function?

W. X. Y. Z.

A. W

B. Y

C. Z

D. X

6. Do the ordered pairs below represent a relation, a function, both a relation and a function, or neither a relation nor a function?

(-2,-1) , (1,-4) , (7,-10) , (8,-11)

A. neither a relation nor a function B. both a relation and a function C. relation only D. function only

Determine whether this picture is an example of a function, relation, function and relation, or neither relation nor function.

A. function and relation B. function only C. relation only D. neither function nor relation

8. Which relation diagram represents a function?

W. X.

Y. Z.

A. Z

B. X

C. W

D. Y

9. Which of the following relations describes a function?

A. { (2, 2), (3, 2), (4, 2), (5, 2) }

B.

C. { (0, 0), (2, -2), (2, 2), (3, 3) }

D. { (2, 3), (2, 4), (2, 5), (2, 6) }

11. Which relation diagram represents a function?

W. X.

Y. Z.

A. W

B. X

C. Y

D. Z

12. Which of the following relations describes a function?

A. { (0, 0), (1, -1), (1, 1), (2, 2) }

B.

C. { (-1, 0), (0, 1), (1, 0), (0, -1) }

D. { (-2, 2), (-1, 1), (1, 1), (2, 2) }

13. Which of these mappings is a function?

W. X. Y. Z.

A. W

B. Z

C. X

D. Y

14. Which of these graphs represents a function?

W. X.

Y. Z.

A. X

17. Think about the vertical line test and answer the following question. Would a vertical line be a relation, a function, both a relation and a function, or neither a relation nor a function?

A. function only B. both a relation and a function C. neither a relation nor a function D. relation only

18. Which of the following graphs is not a function?

W. X.

Y. Z.

A. Y

B. W

C. Z

D. X

19. Which of these t-tables represents a function?

W. X. Y. Z.

A. X

B. Z

C. Y

D. W

20. Which of the following relations describes a function?

A. { (-3, 9), (-2, 4), (2, 4), (3, 9) }

B. { (2, -2), (0, 0), (2, 2), (3, 3) }

C. { (-2, 0), (0, 2), (2, 0), (0, -2) }

D. { (9, -3), (4, -2), (4, 2), (9, 3) }

22. Which relation diagram represents a function?

W. X.

Y. Z.

A. Y

B. W

C. Z

D. X

Determine whether this picture is an example of a function, relation, function and relation, or neither relation nor function.

A. neither function nor relation B. relation only C. function only D. function and relation

24. Do the ordered pairs below represent a relation, a function, both a relation and a function, or neither a relation nor a function?

(-4,-3) , (1,-8) , (-4,-14) , (9,-16)

A. function only B. both a relation and a function C. neither a relation nor a function D. relation only

24. D

25. A

Explanations

  1. A relation is a set of one or more ordered pairs.

A function is a relation in which each element of the domain is paired with EXACTLY one element of the range.

The Vertical Line Test: Given the graph of a relation, if a vertical line can be drawn that crosses the graph in more than one place, then the relation is not a function.

The graph does not pass the vertical line test; therefore, the graph is not a function, and it is a relation only.

  1. Use the vertical line test to determine if the graphs represent a function.

The only graph given that passes the vertical line test is Y.

  1. A function maps each domain element to only one range element.

The t-table Y is the only table that does not show a domain element paired with two or more range elements.

  1. Use the vertical line test to determine if the graphs represent a function.

The only graph given that passes the vertical line test is Y.

  1. A function is a set of ordered pairs such that for each domain element there is only one range element.

The set of ordered pairs { (-2, -3), (-3, -2), (2, 3), (3, 2) } is the only set that does not pair a domain element with two or more range elements.

  1. A relation is a set of one or more ordered pairs.

A function is a relation in which each element of the domain is paired with EXACTLY one element of the range.

In this case, there is one y -coordinate for every x -coordinate.

The vertical line test can be used to determine this.

Therefore, it is both a relation and a function.

  1. A relation is a set of one or more ordered pairs.

A function is a relation in which each element of the domain is paired with EXACTLY one element of the range.

The Vertical-Line Test: Given the graph of a relation, if a vertical line can be drawn that does not cross the graph in more than one place, it is a function.

Any vertical line drawn where x > -4 will cross the graph in more than one place.

Therefore, the graph is not a function, it is a relation only.

  1. For a relation to be a function, each input value can only correspond to one output value. The relation diagram where each input value has exactly one arrow drawn to an output value will represent a function.

Therefore, diagram W represents a function.

  1. A function is a set of ordered pairs such that for each domain element there is only one range element.

The set of ordered pairs { (2, 2), (3, 2), (4, 2), (5, 2) } is the only set that does not pair a domain element with two or more range elements.

  1. Use the vertical line test to determine if the graphs represent a function.

The only graph given that passes the vertical line test is Y.

  1. For a relation to be a function, each input value can only correspond to one output value. The relation diagram where each input value has exactly one arrow drawn to an output value will represent a function.

Therefore, diagram W represents a function.

  1. A function is a set of ordered pairs such that for each domain element there is only one range element.

The set of ordered pairs { (-2, 2), (-1, 1), (1, 1), (2, 2) } is the only set that does not pair a domain element with two or more range elements.

  1. A function maps each domain element to only one range element.

The only mapping that does not map a domain element to two or more range elements is Z.

  1. Use the vertical line test to determine if the graphs represent a function.

The only graph given that passes the vertical line test is Z.

  1. A function maps each domain element to only one range element.

The only mapping that does not map a domain element to two or more range elements is Z.

  1. A relation is a set of one or more ordered pairs.

A function is a relation in which each element of the domain is paired with EXACTLY one element of the range.

In the table below, there are two y -coordinates for the x -coordinate -10. Therefore, it is a relation only and not a function.

x

y 34 32 40 34

  1. A relation is a set of one or more ordered pairs.

A function is a relation in which each element of the domain is paired with EXACTLY one element of the range.

The Vertical Line Test: Given the graph of a relation, if a vertical line can be drawn that crosses the graph in more than one place, then the relation is not a function.

Since the graph does not pass the vertical line test, it is not a function, it is a relation only.

  1. A relation is a set of one or more ordered pairs.

A function is a relation in which each element of the domain is paired with EXACTLY one element of the range.

There are two y -coordinates (range element) when x = -4.

Therefore, it is a relation only.

  1. A function maps each domain element to only one range element.

The t-table Y is the only table that does not show a domain element paired with two or more range elements.