Practice Constant vs Variable in Math

Use these practice problems to test your method after reviewing the concept explanation and worked examples.

Quick Recap

Constants are symbols with fixed, unchanging values; variables are symbols whose values can change or are yet to be determined.

\pi \approx 3.14159 is always the same (constant). x can be anything (variable).

Example 1

easy
In C = 2\pi r, identify the constants and variables.

Example 2

medium
In the equation y = 3x + 5, someone says '3 is a variable because it could be any slope.' Is this correct?

Example 3

easy
In F = ma (Newton's second law), which symbols are variables?

Example 4

medium
Is 0 a constant or a variable?
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