Functions for 1st Graders: Learn the Basics of Functions

Question 1

A list of pairs where the first number is an input and the second number is the output is called a/an:

Accepted Answer

Ordered pairs

Answer

Input and output values

Answer

Lines and curves

Answer

Numbers and letters

Question 2

What part of a function tells you what you start with?

Accepted Answer

Input

Answer

Output

Answer

Rule

Answer

Answer

Question 3

In a function, each input value corresponds to:

Accepted Answer

Exactly one output value

Answer

No output value

Answer

Multiple output values

Answer

One or more output values

Question 4

Which of these functions is a constant function?

Accepted Answer

y = 3

Answer

y = x + 2

Answer

y = x^2

Answer

y = 1/x

Question 5

What is the number that comes out of the function f(x) = x + 2 when you put in 5?

Accepted Answer

7

Answer

2

Answer

5

Answer

10

Question 6

What is the number that tells you how steep the line for the function f(x) = 2x + 1 is?

Accepted Answer

2

Answer

1

Answer

3

Answer

4

Question 7

Which of these tables represents a function?

Accepted Answer

Input | Output
-------|-------
1 | 2
2 | 3
3 | 4

Answer

Input | Output
-------|-------
1 | 2
2 | 3
3 | 2

Answer

Input | Output
-------|-------
1 | 2
2 | 2
3 | 2

Answer

Input | Output
-------|-------
1 | 2
2 | 3
2 | 4

Question 8

Which of these shows the rule 'y equals x plus 1'?

Accepted Answer

A diagonal line going up and to the right

Answer

A horizontal line at the number 1

Answer

A vertical line at the number 1

Answer

A curved line with a peak at (1, 1)

Question 9

What is a function?

Accepted Answer

A rule that assigns to each input exactly one output

Answer

A rule that assigns to each input two or more outputs

Answer

A rule that assigns to each output one or more inputs

Question 10

What is the range of the function y = |x|?

Accepted Answer

All non-negative numbers

Answer

All numbers

Answer

All negative numbers

Question 11

Which of these functions is linear?

Accepted Answer

y = 2x + 1

Answer

y = x^2

Answer

y = |x|

Question 12

Which table represents a function?

Accepted Answer

{ (1, 2), (2, 4), (3, 6) }

Answer

{ (1, 2), (1, 4), (1, 6) }

Answer

{ (1, 2), (3, 4), (5, 6) }

Answer

{ (1, 2), (2, 3), (2, 4) }

Question 13

Which of the following functions is a straight-line function?

Accepted Answer

f(x) = 2x + 1

Answer

f(x) = 1 / x

Answer

f(x) = |x|

Answer

f(x) = x^2

Question 14

What rule takes a number and gives you a new number by adding 1 to it?

Accepted Answer

Add 1

Answer

Multiply by 2

Answer

Subtract 1

Answer

Divide by 2

Question 15

Which rule always gives you the same amount more each time?

Accepted Answer

Adding 3 each time

Answer

Adding different amounts each time

Answer

Dividing by a different number each time

Answer

Multiplying by a different number each time

Question 16

What are all the numbers you can use in this rule:  'Double the number'?

Accepted Answer

Any number you want!

Answer

Only numbers bigger than 10

Answer

Only numbers smaller than 10

Answer

Only even numbers

Question 17

Which rule is different for numbers bigger than 0 and numbers smaller than 0?

Accepted Answer

If the number is bigger than 0, keep it the same. If it's smaller than 0, make it positive.

Answer

Multiply the number by itself

Answer

Add 1 to the number

Answer

Divide the number by 2

Question 18

What rule tells you how much money you get paid if you work for a certain number of hours?

Accepted Answer

The rule that tells you how much you get paid per hour

Answer

The rule that tells you how old you are

Answer

The rule that tells you what color your shirt is

Question 19

What is a rule that takes a number and gives you a new number?

Accepted Answer

A function

Answer

A color

Answer

A shape

Question 20

If we add 2 to a number, and the answer is 5, what was the number?

Accepted Answer

3

Answer

1

Answer

4

Answer

6

Question 21

Which table shows a function?

Accepted Answer

Input | Output
-------|-------
1 | 3
2 | 5
3 | 7

Answer

Input | Output
-------|-------
1 | 3
2 | 5
2 | 7

Answer

Input | Output
-------|-------
1 | 3
1 | 5
3 | 7

Answer

Input | Output
-------|-------
1 | 3
2 | 3
3 | 7

Question 22

Look at this table:

Input | Output 
-------|--------
 1     | 3 
 2     | 4 
 3     | 5

What is the answer when the input is 2?

Accepted Answer

4

Answer

1

Answer

5

Answer

3

Question 23

Our rule is 'add 2'. What is the answer if we start with 4?

Accepted Answer

6

Answer

8

Answer

2

Answer

4

Question 24

Which picture shows a function?

Accepted Answer

A picture showing a machine with one input and one output.

Answer

A picture showing a machine with one input and multiple outputs.

Answer

A picture showing a machine with multiple inputs and one output.

Question 25

You have 3 cookies. Your friend gives you 2 more. How many cookies do you have now?

Accepted Answer

5

Answer

4

Answer

6

Answer

3

Question 26

You have 5 pencils. You lose 2 pencils. How many pencils do you have left?

Accepted Answer

3

Answer

2

Answer

7

Answer

1

Question 27

Look at this graph. If the input is 2, what is the output?

[A simple graph showing a few points, with a clear linear relationship]

Accepted Answer

[The correct output value from the graph]

Answer

[A value that is not on the graph]

Answer

[A different value from the graph]

Answer

[A value that is not related to the graph]

Question 28

You have 4 balloons. You blow up 3 more balloons. How many balloons do you have now?

Accepted Answer

7

Answer

4

Answer

1

Answer

3

Question 29

You put 2 apples in a basket. Then you put 2 more apples in the basket. How many apples are in the basket now?

Accepted Answer

4

Answer

6

Answer

3

Answer

2

Question 30

This table shows how many balls are in a box.  If you put 3 more balls in the box, how many balls will be in the box in total?

| Balls | 
|-------| 
|   ?   |   3    | 
|   ??  |   4    |

Accepted Answer

6

Answer

5

Answer

7

Answer

3

Question 31

This table shows how many balloons are in each bag.  If you have 4 bags, how many balloons do you have in total?

| Bags | Balloons |
|-------|--------|
|   1   |   2    |
|   2  |   4    |

Accepted Answer

8

Answer

4

Answer

6

Answer

10

Question 32

You have 5 stickers. You get 2 more stickers. How many stickers do you have now?

Accepted Answer

7

Answer

8

Answer

6

Answer

3

Question 33

You have 8 cookies. You eat 2 cookies. How many cookies are left?

Accepted Answer

6

Answer

10

Answer

4

Answer

5

Question 34

In a game, the rule is: "Add 2 to the number you roll." If you roll a 3, what is the answer?

Accepted Answer

5

Answer

1

Answer

3

Answer

7

Question 35

Look at this table:

| Input | Output |
|-------|--------|
|   1   |   1    |
|   2  |   2    |
|   3 |   ?    |

What is the output if the input is 3?

Accepted Answer

3

Answer

4

Answer

2

Answer

1

Question 36

A machine takes in shapes and turns them blue. What will come out if you put in a square?

Accepted Answer

A blue square

Answer

A red square

Answer

A blue triangle

Question 37

Look at the graph. It shows how many toes there are on each foot. How many toes are on two feet?

(Graph displays two points: (1 foot, 5 toes) and (2 feet, 10 toes))

Accepted Answer

10

Answer

1

Answer

2

Answer

5

Question 38

Lilly has 4 friends. If she gives each friend 2 cookies, how many cookies does she give away?

Accepted Answer

8

Answer

2

Answer

4

Question 39

This machine doubles the number of toys you put in. If you put in 4 toys, how many come out?

Accepted Answer

8

Answer

4

Answer

1

Answer

2

Question 40

Look at the pattern: Circle, Circle, Square. What comes next?

Accepted Answer

Square

Answer

Triangle

Answer

Circle

Question 41

A baker puts 5 cherries on each cupcake. If he bakes 3 cupcakes, how many cherries does he use?

Accepted Answer

15

Answer

5

Answer

10

Question 42

The rule is: "Draw one more circle than the number of squares." If there are 4 squares, how many circles should you draw?

Accepted Answer

5

Answer

3

Answer

2

Answer

4