Skills · Functions · Intro to Functions

Completing a function table

Printable practice with an answer key the engine computes, at three levels, in as many versions as you need.

Problem types

• find the missing y: y = 3x − 2 with x = 1, 2, 3, 4
• find the missing x: y = 3x − 2 with y = 10 and x missing

Sample Sheet · Level 1

1. y = 5x + 8: 

   x	1	2	3	4
   y	13	18	23	?

2. y = 2x + 8: 

   x	0	1	2	3
   y	8	10	12	?

3. y = 3x + 3: 

   x	0	1	2	3
   y	3	6	9	?

4. y = 3x + 6: 

   x	0	1	2	3
   y	6	9	12	?

5. y = 4x + 1: 

   x	1	2	3	4
   y	5	9	13	?

6. y = 3x + 7: 

   x	1	2	3	4
   y	10	13	16	?

7. y = 5x + 6: 

   x	0	1	2	3
   y	6	11	16	?

8. y = 4x + 7: 

   x	1	2	3	4
   y	11	15	19	?

Answer key

1. 28
2. 14
3. 12
4. 15
5. 17
6. 19
7. 21
8. 23

Sample Sheet · Level 3

1. y = 12x: 

   x	−4	−2	0	?
   y	−2	−1	0	2

2. y = 4x + 3: 

   x	−1	0	1	2
   y	−1	3	7	?

3. y = x² + 4: 

   x	−1	0	1	2
   y	5	4	?	8

4. y = −5x − 8: 

   x	−2	−1	0	1
   y	2	−3	−8	?

5. y = 2x + 3: 

   x	1	2	3	5
   y	5	7	?	13

6. y = 4x − 1: 

   x	−1	0	?	2
   y	−5	−1	3	7

7. y = 23x + 6: 

   x	−6	−3	0	?
   y	2	4	6	8

8. y = 12x + 8: 

   x	0	2	4	?
   y	8	9	10	11

Answer key

1. 4
2. 11
3. 5
4. −13
5. 9
6. 1
7. 3
8. 6

Make your own

Pick the count, the level and the version, and print it with work space and the key on its own page. The same skill also makes an I Do, We Do, You Do lesson, a Mosaic, a Decoder and more.

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