variable


Definition of Variable

  • Variables are (usually) letters or other symbols that represent unknown numbers or values.

Examples of Variable

  • The following are examples of algebraic expressions and equations containing variables.
    2x + 5 = 10, the variable here is x
    7y + 10 = 24, the variable here is y
    a2 + b2, the variables here are a and b

Solved Example on Variable

Identify the variables in the equation, y = 3x + 2.                    
Choices:
A. 2 and y
B. x and y
C. x and 3
D. 2 and 3
Correct Answer: B
Solution:
Step 1: Variables are letters or other symbols that represent unknown numbers or values.
Step 2: Therefore, x and y are the variables in the given equation
y = 3x + 2.

Related Terms for Variable

  • Algebraic Expression
  • Equation
  • Symbols