Input-Output Tables for 4th Grade
An input-output table applies the same rule to every input, so finding the rule means testing one candidate against every row. The examples below cover single and two-step rules, with practice problems and a full answer key.
DETAILED EXPLANATION
An input-output table has a rule that turns each input into an output. If the rule is ‘add 5,’ then input 3 gives output 8. Find the rule by looking at how inputs and outputs relate.
WORKED EXAMPLES WITH STEP BY STEP SOLUTIONS
Example 1
In a table, input 2 gives output 6; input 4 gives output 12. What is the rule?
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Solutions:
Step 1: Apply the concept from the lesson above.
Step 2: Carry out the operation or reasoning.
Answer: Output = input × 3. The rule is multiply by 3.
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