Function Rules, Comparison, and Decisions Worksheet
📝 Worksheet hard ⏱️ 22 minutes 10 problems
Function Rules, Comparison, and Decisions Worksheet
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. A function gives exactly one __ for each input.
2. Which relation is a function?
3. Match the representation to a strength: table
Match with:
Answer:
4. If y = 4x + 1 and x = 3, then y = __.
5. Which function has the greater rate of change?
6. Why should students compare the same features when two functions are shown in different representations?
7. Match the pattern to its type: outputs double each step
Match with:
Answer:
8. A straight-line graph usually represents a __ function.
9. Which context most likely uses only whole-number inputs?
10. Why can one linear function be a better model than another for the same situation?
📋 Teacher Answer Key
1. output
2. input 2 gives output 9 only
3. shows repeated inputs and output changes clearly
4. 13
5. y = 5x + 2 compared with a table that rises by 3 each row
6. Rate of change, starting value, and linearity let readers compare the same relationship features even when the formats look different.
7. nonlinear
8. linear
9. number of movie tickets purchased
10. A model must match the situation’s starting value, rate of change, and allowed inputs, not just look linear.