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Is It a Function? (Tables & Ordered Pairs) — Easy Worksheet 1
Grade 8 · Whoobee Name: ____________________ Date: __________
Is each relation a function? Write Yes or No.
How to solve
A relation is a function when every input (x-value) has exactly one output (y-value). Look down the x-column: if the same x appears with two different y-values, it is not a function. Two different inputs may share the same output, and a pair that is simply listed twice does not break the rule.
Example
Is the relation shown in the table a function? Write Yes or No.
| x | y |
|---|---|
| 2 | 5 |
| 1 | 7 |
| 8 | 4 |
| 5 | 8 |
Answer: Yes
| x | y |
|---|---|
| 1 | 9 |
| 7 | 3 |
| 1 | 0 |
| 3 | 4 |
Not quite. The answer is
💡 The input 1 has two different outputs, 9 and 0. A function gives each input only one output, so this is not a function: No.
✓ Correct!
Not quite. The answer is
💡 The input 1 has two different outputs, 9 and 0. A function gives each input only one output, so this is not a function: No.
💡 How to solve: Is It a Function? (Tables & Ordered Pairs)
A relation is a function when every input (x-value) has exactly one output (y-value). Look down the x-column: if the same x appears with two different y-values, it is not a function. Two different inputs may share the same output, and a pair that is simply listed twice does not break the rule.
Try a similar one
Is the relation shown in the table a function? Write Yes or No.
| x | y |
|---|---|
| 7 | 4 |
| 8 | 9 |
| 4 | 3 |
| 5 | 9 |
✓ You've got it! Press Next to keep going. Not yet — the answer is . Read the steps above once more.
Not quite. The answer is
💡 The inputs are 8, 4, 2, 3. Each input has exactly one output, so the relation is a function: Yes.
✓ Correct!
Not quite. The answer is
💡 The inputs are 8, 4, 2, 3. Each input has exactly one output, so the relation is a function: Yes.
💡 How to solve: Is It a Function? (Tables & Ordered Pairs)
A relation is a function when every input (x-value) has exactly one output (y-value). Look down the x-column: if the same x appears with two different y-values, it is not a function. Two different inputs may share the same output, and a pair that is simply listed twice does not break the rule.
Try a similar one
Is the relation shown in the table a function? Write Yes or No.
| x | y |
|---|---|
| 4 | 3 |
| 7 | 9 |
| 4 | 4 |
| 3 | 3 |
✓ You've got it! Press Next to keep going. Not yet — the answer is . Read the steps above once more.
| x | y |
|---|---|
| 8 | 0 |
| 4 | 3 |
| 6 | 4 |
| 9 | 1 |
Not quite. The answer is
💡 The inputs are 8, 4, 6, 9. Each input has exactly one output, so the relation is a function: Yes.
✓ Correct!
Not quite. The answer is
💡 The inputs are 8, 4, 6, 9. Each input has exactly one output, so the relation is a function: Yes.
💡 How to solve: Is It a Function? (Tables & Ordered Pairs)
A relation is a function when every input (x-value) has exactly one output (y-value). Look down the x-column: if the same x appears with two different y-values, it is not a function. Two different inputs may share the same output, and a pair that is simply listed twice does not break the rule.
Try a similar one
Is the relation shown in the table a function? Write Yes or No.
| x | y |
|---|---|
| 8 | 5 |
| 9 | 9 |
| 2 | 9 |
| 6 | 2 |
✓ You've got it! Press Next to keep going. Not yet — the answer is . Read the steps above once more.
Not quite. The answer is
💡 The inputs are 9, 3, 7, 2. Each input has exactly one output, so the relation is a function: Yes.
✓ Correct!
Not quite. The answer is
💡 The inputs are 9, 3, 7, 2. Each input has exactly one output, so the relation is a function: Yes.
💡 How to solve: Is It a Function? (Tables & Ordered Pairs)
A relation is a function when every input (x-value) has exactly one output (y-value). Look down the x-column: if the same x appears with two different y-values, it is not a function. Two different inputs may share the same output, and a pair that is simply listed twice does not break the rule.
Try a similar one
Is the relation shown in the table a function? Write Yes or No.
| x | y |
|---|---|
| 0 | 3 |
| 6 | 0 |
| 1 | 2 |
| 9 | 6 |
✓ You've got it! Press Next to keep going. Not yet — the answer is . Read the steps above once more.
| x | y |
|---|---|
| 3 | 7 |
| 0 | 1 |
| 0 | 0 |
| 9 | 4 |
Not quite. The answer is
💡 The input 0 has two different outputs, 0 and 1. A function gives each input only one output, so this is not a function: No.
✓ Correct!
Not quite. The answer is
💡 The input 0 has two different outputs, 0 and 1. A function gives each input only one output, so this is not a function: No.
💡 How to solve: Is It a Function? (Tables & Ordered Pairs)
A relation is a function when every input (x-value) has exactly one output (y-value). Look down the x-column: if the same x appears with two different y-values, it is not a function. Two different inputs may share the same output, and a pair that is simply listed twice does not break the rule.
Try a similar one
Is the relation shown in the table a function? Write Yes or No.
| x | y |
|---|---|
| 1 | 5 |
| 8 | 7 |
| 3 | 7 |
| 7 | 0 |
✓ You've got it! Press Next to keep going. Not yet — the answer is . Read the steps above once more.
Not quite. The answer is
💡 The input 0 has two different outputs, 2 and 8. A function gives each input only one output, so this is not a function: No.
✓ Correct!
Not quite. The answer is
💡 The input 0 has two different outputs, 2 and 8. A function gives each input only one output, so this is not a function: No.
💡 How to solve: Is It a Function? (Tables & Ordered Pairs)
A relation is a function when every input (x-value) has exactly one output (y-value). Look down the x-column: if the same x appears with two different y-values, it is not a function. Two different inputs may share the same output, and a pair that is simply listed twice does not break the rule.
Try a similar one
Is the relation shown in the table a function? Write Yes or No.
| x | y |
|---|---|
| 6 | 6 |
| 7 | 0 |
| 2 | 4 |
| 3 | 1 |
✓ You've got it! Press Next to keep going. Not yet — the answer is . Read the steps above once more.
| x | y |
|---|---|
| 5 | 2 |
| 9 | 8 |
| 8 | 5 |
| 5 | 9 |
Not quite. The answer is
💡 The input 5 has two different outputs, 2 and 9. A function gives each input only one output, so this is not a function: No.
✓ Correct!
Not quite. The answer is
💡 The input 5 has two different outputs, 2 and 9. A function gives each input only one output, so this is not a function: No.
💡 How to solve: Is It a Function? (Tables & Ordered Pairs)
A relation is a function when every input (x-value) has exactly one output (y-value). Look down the x-column: if the same x appears with two different y-values, it is not a function. Two different inputs may share the same output, and a pair that is simply listed twice does not break the rule.
Try a similar one
Is the relation shown in the table a function? Write Yes or No.
| x | y |
|---|---|
| 4 | 9 |
| 3 | 3 |
| 2 | 3 |
| 2 | 5 |
✓ You've got it! Press Next to keep going. Not yet — the answer is . Read the steps above once more.
Not quite. The answer is
💡 The input 7 has two different outputs, 3 and 9. A function gives each input only one output, so this is not a function: No.
✓ Correct!
Not quite. The answer is
💡 The input 7 has two different outputs, 3 and 9. A function gives each input only one output, so this is not a function: No.
💡 How to solve: Is It a Function? (Tables & Ordered Pairs)
A relation is a function when every input (x-value) has exactly one output (y-value). Look down the x-column: if the same x appears with two different y-values, it is not a function. Two different inputs may share the same output, and a pair that is simply listed twice does not break the rule.
Try a similar one
Is the relation shown in the table a function? Write Yes or No.
| x | y |
|---|---|
| 6 | 2 |
| 5 | 6 |
| 9 | 1 |
| 6 | 6 |
✓ You've got it! Press Next to keep going. Not yet — the answer is . Read the steps above once more.
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Is It a Function? (Tables & Ordered Pairs) — Easy Worksheet 1
Is each relation a function? Write Yes or No.