College Algebra

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Input

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College Algebra

Definition

Input is the value substituted into a function. It is commonly denoted as $x$ in functional notation.

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5 Must Know Facts For Your Next Test

  1. In the function $f(x) = y$, $x$ represents the input.
  2. The domain of a function consists of all possible inputs.
  3. Each input in a function has exactly one corresponding output.
  4. Input values are often represented on the horizontal axis (x-axis) in a graph.
  5. Valid inputs must satisfy any restrictions defined by the function's domain.

Review Questions

  • What is the input in the function notation $f(x) = y$?
  • Why must an input satisfy certain restrictions in a given function?
  • How do you determine if an input is valid for a specific function?
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