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Completing a Function Table from a Rule — Easy Worksheet 1
Grade 8 · Whoobee Name: ____________________ Date: __________
Use the rule to find the number that goes in place of ? in each table.
How to solve
The rule tells you how to turn each input x into its output y. Put the input from the row with the ? into the rule in place of x, then multiply first and add or subtract second. The result is the missing output.
Example
The table follows the rule y = 2x + 9. What number goes in place of ?
| x | y |
|---|---|
| 3 | 15 |
| 4 | 17 |
| 5 | 19 |
| 6 | 21 |
| x | y |
|---|---|
| 0 | 9 |
| 1 | 12 |
| 5 | 24 |
| 6 | ? |
Not quite. The answer is
💡 The ? is the output for x = 6. Put x = 6 into y = 3x + 9: y = 3(6) + 9 = 18 + 9 = 27. The missing output is 27.
✓ Correct!
Not quite. The answer is
💡 The ? is the output for x = 6. Put x = 6 into y = 3x + 9: y = 3(6) + 9 = 18 + 9 = 27. The missing output is 27.
💡 How to solve: Completing a Function Table from a Rule
The rule tells you how to turn each input x into its output y. Put the input from the row with the ? into the rule in place of x, then multiply first and add or subtract second. The result is the missing output.
Try a similar one
The table follows the rule y = 2x + 1. What number goes in place of ?
| x | y |
|---|---|
| 0 | 1 |
| 3 | ? |
| 5 | 11 |
| 6 | 13 |
✓ You've got it! Press Next to keep going. Not yet — the answer is . Read the steps above once more.
| x | y |
|---|---|
| 0 | ? |
| 4 | 18 |
| 5 | 21 |
| 6 | 24 |
Not quite. The answer is
💡 The ? is the output for x = 0. Put x = 0 into y = 3x + 6: y = 3(0) + 6 = 0 + 6 = 6. The missing output is 6.
✓ Correct!
Not quite. The answer is
💡 The ? is the output for x = 0. Put x = 0 into y = 3x + 6: y = 3(0) + 6 = 0 + 6 = 6. The missing output is 6.
💡 How to solve: Completing a Function Table from a Rule
The rule tells you how to turn each input x into its output y. Put the input from the row with the ? into the rule in place of x, then multiply first and add or subtract second. The result is the missing output.
Try a similar one
The table follows the rule y = 2x + 6. What number goes in place of ?
| x | y |
|---|---|
| 1 | 8 |
| 4 | ? |
| 5 | 16 |
| 6 | 18 |
✓ You've got it! Press Next to keep going. Not yet — the answer is . Read the steps above once more.
| x | y |
|---|---|
| 0 | 3 |
| 1 | 5 |
| 2 | ? |
| 6 | 15 |
Not quite. The answer is
💡 The ? is the output for x = 2. Put x = 2 into y = 2x + 3: y = 2(2) + 3 = 4 + 3 = 7. The missing output is 7.
✓ Correct!
Not quite. The answer is
💡 The ? is the output for x = 2. Put x = 2 into y = 2x + 3: y = 2(2) + 3 = 4 + 3 = 7. The missing output is 7.
💡 How to solve: Completing a Function Table from a Rule
The rule tells you how to turn each input x into its output y. Put the input from the row with the ? into the rule in place of x, then multiply first and add or subtract second. The result is the missing output.
Try a similar one
The table follows the rule y = x + 5. What number goes in place of ?
| x | y |
|---|---|
| 2 | ? |
| 3 | 8 |
| 4 | 9 |
| 6 | 11 |
✓ You've got it! Press Next to keep going. Not yet — the answer is . Read the steps above once more.
| x | y |
|---|---|
| 1 | 5 |
| 2 | ? |
| 3 | 7 |
| 4 | 8 |
Not quite. The answer is
💡 The ? is the output for x = 2. Put x = 2 into y = x + 4: y = 2 + 4 = 6. The missing output is 6.
✓ Correct!
Not quite. The answer is
💡 The ? is the output for x = 2. Put x = 2 into y = x + 4: y = 2 + 4 = 6. The missing output is 6.
💡 How to solve: Completing a Function Table from a Rule
The rule tells you how to turn each input x into its output y. Put the input from the row with the ? into the rule in place of x, then multiply first and add or subtract second. The result is the missing output.
Try a similar one
The table follows the rule y = x + 7. What number goes in place of ?
| x | y |
|---|---|
| 1 | ? |
| 3 | 10 |
| 4 | 11 |
| 6 | 13 |
✓ You've got it! Press Next to keep going. Not yet — the answer is . Read the steps above once more.
| x | y |
|---|---|
| 0 | 3 |
| 2 | 11 |
| 3 | ? |
| 6 | 27 |
Not quite. The answer is
💡 The ? is the output for x = 3. Put x = 3 into y = 4x + 3: y = 4(3) + 3 = 12 + 3 = 15. The missing output is 15.
✓ Correct!
Not quite. The answer is
💡 The ? is the output for x = 3. Put x = 3 into y = 4x + 3: y = 4(3) + 3 = 12 + 3 = 15. The missing output is 15.
💡 How to solve: Completing a Function Table from a Rule
The rule tells you how to turn each input x into its output y. Put the input from the row with the ? into the rule in place of x, then multiply first and add or subtract second. The result is the missing output.
Try a similar one
The table follows the rule y = 5x + 1. What number goes in place of ?
| x | y |
|---|---|
| 1 | 6 |
| 3 | ? |
| 4 | 21 |
| 6 | 31 |
✓ You've got it! Press Next to keep going. Not yet — the answer is . Read the steps above once more.
| x | y |
|---|---|
| 1 | 12 |
| 2 | 15 |
| 5 | ? |
| 6 | 27 |
Not quite. The answer is
💡 The ? is the output for x = 5. Put x = 5 into y = 3x + 9: y = 3(5) + 9 = 15 + 9 = 24. The missing output is 24.
✓ Correct!
Not quite. The answer is
💡 The ? is the output for x = 5. Put x = 5 into y = 3x + 9: y = 3(5) + 9 = 15 + 9 = 24. The missing output is 24.
💡 How to solve: Completing a Function Table from a Rule
The rule tells you how to turn each input x into its output y. Put the input from the row with the ? into the rule in place of x, then multiply first and add or subtract second. The result is the missing output.
Try a similar one
The table follows the rule y = 3x + 8. What number goes in place of ?
| x | y |
|---|---|
| 0 | 8 |
| 1 | ? |
| 2 | 14 |
| 5 | 23 |
✓ You've got it! Press Next to keep going. Not yet — the answer is . Read the steps above once more.
| x | y |
|---|---|
| 1 | 9 |
| 3 | ? |
| 4 | 12 |
| 6 | 14 |
Not quite. The answer is
💡 The ? is the output for x = 3. Put x = 3 into y = x + 8: y = 3 + 8 = 11. The missing output is 11.
✓ Correct!
Not quite. The answer is
💡 The ? is the output for x = 3. Put x = 3 into y = x + 8: y = 3 + 8 = 11. The missing output is 11.
💡 How to solve: Completing a Function Table from a Rule
The rule tells you how to turn each input x into its output y. Put the input from the row with the ? into the rule in place of x, then multiply first and add or subtract second. The result is the missing output.
Try a similar one
The table follows the rule y = x + 2. What number goes in place of ?
| x | y |
|---|---|
| 0 | 2 |
| 1 | ? |
| 2 | 4 |
| 6 | 8 |
✓ You've got it! Press Next to keep going. Not yet — the answer is . Read the steps above once more.
| x | y |
|---|---|
| 1 | 9 |
| 2 | ? |
| 3 | 15 |
| 4 | 18 |
Not quite. The answer is
💡 The ? is the output for x = 2. Put x = 2 into y = 3x + 6: y = 3(2) + 6 = 6 + 6 = 12. The missing output is 12.
✓ Correct!
Not quite. The answer is
💡 The ? is the output for x = 2. Put x = 2 into y = 3x + 6: y = 3(2) + 6 = 6 + 6 = 12. The missing output is 12.
💡 How to solve: Completing a Function Table from a Rule
The rule tells you how to turn each input x into its output y. Put the input from the row with the ? into the rule in place of x, then multiply first and add or subtract second. The result is the missing output.
Try a similar one
The table follows the rule y = x + 9. What number goes in place of ?
| x | y |
|---|---|
| 0 | 9 |
| 1 | 10 |
| 2 | ? |
| 6 | 15 |
✓ You've got it! Press Next to keep going. Not yet — the answer is . Read the steps above once more.
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Completing a Function Table from a Rule — Easy Worksheet 1
Use the rule to find the number that goes in place of ? in each table.