Algebra-1

Question Analysis
This question tests the student's ability to calculate the unit rate, specifically the unit price of a book.

Key Concept Explanation
A unit rate is a ratio that compares two different quantities and expresses the amount of one quantity per unit of another. In this case, it is the price per book.

Step-by-step Solution
1. Identify the total cost and the number of books: Total cost = $80, Number of books = 20
2. Calculate the unit price:

Click "Show Answer" to reveal the answer and analysis