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

Video Examples: What is a variable?


Solved Example on Variable

Ques: 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

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