Grade 8 Functions Mapping Diagram Quiz Questions

📚 Quick Study Guide

• 🗺️ A mapping diagram visually represents a relation between two sets.
• 🎯 The first set (input values) is called the domain, and the second set (output values) is called the range.
• ➡️ Arrows are used to map each input value to its corresponding output value.
• ➕ A function is a special type of relation where each input has exactly one output.
• 📝 To test if a mapping diagram represents a function, check if each element in the domain has only one arrow coming from it.
• 📐 If any element in the domain has more than one arrow, it is not a function.
• 💡 If an element in the range has multiple arrows pointing to it, it can still be a function.

🧪 Practice Quiz

1. What does a mapping diagram visually represent?
   1. A coordinate plane
   2. A relation between two sets
   3. A linear equation
   4. A geometric shape
2. In a mapping diagram, what is the first set of values called?
   1. Range
   2. Domain
   3. Function
   4. Relation
3. What does an arrow in a mapping diagram represent?
   1. Subtraction
   2. Division
   3. Mapping of input to output
   4. Multiplication
4. What is a function?
   1. A relation where each input has multiple outputs
   2. A relation where each input has exactly one output
   3. Any diagram with arrows
   4. A set of unrelated numbers
5. How can you determine if a mapping diagram represents a function?
   1. Check if each element in the range has only one arrow pointing to it
   2. Check if each element in the domain has only one arrow coming from it
   3. Count the number of arrows
   4. See if the diagram is colorful
6. If an element in the domain has more than one arrow coming from it, is it a function?
   1. Yes, always
   2. No, never
   3. Sometimes
   4. Only if the arrows point to the same element in the range
7. If an element in the range has multiple arrows pointing to it, can it still be a function?
   1. No, never
   2. Yes, always
   3. Only if the domain also has multiple arrows
   4. Only if the range values are positive