Written by the Fiveable Content Team • Last updated September 2025
Verified for the 2026 exam
Verified for the 2026 exam•Written by the Fiveable Content Team • Last updated September 2025
Definition
In calculus, y(x) represents an arbitrary function where 'x' is the independent variable and 'y' is the dependent variable. It signifies that 'y' can be expressed as some mathematical expression involving 'x'.
Related terms
Dependent variable: In mathematical equations, the dependent variable (like y) relies on another variable (like x).
Independent variable: In mathematical equations, an independent variable (like x) can vary freely or be chosen arbitrarily.
Function notation: Using y(x) notation helps emphasize that we are dealing with functional relationships between variables.