Question

Sort the following in increasing order of the number of variables present in them from top to bottom.

• A. 3x + 5y
• B. 2
• C. xy + 2a
• D. x + 2x

Answer 1

• 2 is a constant. So, no variables in it.
• x + 2x has only one variable which is x, though it is used twice.
• 3x + 5y has two variables, x and y.
• xy + 2a has three variables, x, y and a.