Function Input and Output Practice
📝 Worksheet medium ⏱️ 18 minutes 8 problems
Function Input and Output Practice
Grade 8 Mathematics LearnCrux.com
Name:
Date:
Directions
- Fill in each blank carefully.
- Circle or mark the best answer for each multiple-choice question.
- Match each prompt to the best option before writing your answer.
- Use the larger space to show your thinking on word problems.
1. Match the term to its meaning: function
Match with:
Answer:
2. Which relation is not a function?
3. Match the term to its meaning: input
Match with:
Answer:
4. If the rule is y = 2x + 3 and x = 4, then y = __.
5. Why is one output for each input part of the function definition?
6. Which representation can show whether an input repeats with different outputs?
7. If x is the number of months and y is total savings, then x is the __.
8. Why should students name what the input and output mean in context?
📋 Teacher Answer Key
1. a rule that gives exactly one output for each input
2. input 3 gives outputs 5 and 7
3. starting value
4. 11
5. It keeps the rule consistent so each input determines a single result
6. a table of values
7. input
8. The context explains what the numbers represent and helps students interpret the rule correctly