Worksheet 5: Functions and Relationships Grade 8 Mathematics

Worksheet 5: Functions and Relationships

Grade 8 Mathematics

1.

Find the rule for each of the following tables. Fill in the missing values in the table using the

rule.

a)

-2

-1

0

1

2

?

?

5

?

b)

-1

0

1

2

?

?

10

-8

-2

4

?

28

40

?

-3

-2

-1

3

?

8

?

15

?

0

?

-15

2

5

?

12

?

?

8

?

2

?

9

?

-4

?

c)

20

d)

0

1

e)

-1

0

1

?

2.

For each of the tables in question 1, draw a graph to represent the

3.

Look at the tables in questions 1. From the tables, which variable (letter) is the input value and

which variable is the output value?

and y values.

4.

For each of the flow diagrams below fill in the missing input and output values.

a)

-2

_______

3

_______

8

b)

_______

20

_______

-5

______

______

0

______

______

x8

______

______

15

______

______

90

______

______

63

______

______

¡Â9

______

- 12

______

36

______

______

9

______

______

12

______

______

-5

______

______

x 12

______

- 17

______

______

______

______

______

-1

______

______

16

______

______

4

5.

______

______

-4

e)

+

10

54

d)

_______

12

6

c)

x3 + 7

-6

______

x (¨C 3)

______

20

______

______

-7

______

______

For each of the input and output diagrams in question 4, using

as your input value and

as

your output value, write an algebraic expression to represent the rules.

6.

Using the rules you wrote down in question 5, find the output value for each flow diagram for

an input value of -10.

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