Which statement describes a constant in mathematical terms?

A constant in mathematics is defined as a value that remains unchanged throughout a given discussion or calculation. This means that when referred to within an equation or expression, a constant always retains the same value, regardless of other factors or changing variables present in the situation.

For example, the number 5 is a constant because it does not vary; it is always 5. When used within equations, other elements may change—like variables that can take on different values—but the constant itself stays the same, allowing it to serve as a reliable part of mathematical expressions and calculations.

The other statements describe characteristics of variables or other mathematical elements, highlighting the distinct nature of constants as unchanging values.