A. Directions: Analyze and choose the letter of the correct answer.
1. Which of the following is a variable?
A. 1 B. y C. 2 D. 5
2. Which is constant in this expression?
A. π B. r C. π & 2 D. π & r
3. Which of the following can be used as variables?
A. a B. c C. x D. All of these
4. Any symbol representing one fixed value that does not change is called______________.
A. equation B. constant C. variable D. expression
5. What do you call to the letters or symbols that represents a number?
A. equation B. constant c. variable D. expression