Practice Functional Dependency in Math

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

Quick Recap

A relationship where the value of one quantity (the output or dependent variable) is completely determined by the value of another quantity (the input or independent variable). If y depends on x, then knowing x uniquely determines y.

Temperature determines ice cream sales—sales DEPEND ON temperature.

Example 1

easy
Is y functionally dependent on x in the equation y = 3x + 1?

Example 2

medium
Is y functionally dependent on x in x^2 + y^2 = 25?

Example 3

easy
Does \{(1,2), (1,3), (2,4)\} represent a function?

Example 4

medium
In a class, is final grade a function of student name?
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