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In the expression , identify which part is the constant and explain why.
Case context: The expression has one variable term and one number term.
Question: In the expression , identify which part is the constant and explain why.
Sample answer: The number is the constant. Its value never changes, while is a variable because it can take different values.
Key points:
- A constant is a number whose value never changes.
- In , the is the constant.
- The variable can change value, but cannot.
- Telling constants apart from variables is a basic algebra skill.
Rubric: Full credit: identifies as the constant and explains that it does not change. Partial credit: identifies as the constant but gives no explanation. No credit: identifies as the constant or gives no clear answer.
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