Two variables related in such a way that their values always have a constant ratio directly vary. Learn more about direct variation with this free math lesson.

Learn what the domain and range mean, and how to determine the domain and range of a given function. The domain of a function is the set of all possible input values, while the range is the set of …

Simple Definition of Linear Equation: An equation that forms a straight line on a graph. More precisely, a linear equation is one that is dependent only on constants and a variable raised to the first power.

Jul 13, 2024 · The constant of proportionality, and/or the input and output, can be negative, though that is rare; when they are, the usual idea that increasing input for a direct proportion causes an increase …

Simplify an expression by combining like terms. In this process you will find terms that share the same variable and combine them together to form a simpler expression.

Sep 4, 2008 · Prove algebraically and explain grahically why a polynomial that is an odd function is no longer an odd function when a non-zero constant is added. Provide examples.

This finance lesson covers future value of money. When interest rates are taken into account, a fixed amount of money in the future is always worth less than the same amount today. Alternatively, a …

Mar 3, 2021 · If I have a limit, 3x as x approaches 2, for example, and say it equals 7, how can I prove my statement is false using the formal definition of limit? Another question I have is, how can I prove …

Exponential functions have variables raised to a power or exponent. This lesson covers exponential functions and how to understand and eventually solve them.

Mar 30, 2007 · What is the definition of focus (mathematical) of a hyperbola? It is by definition c = sqrt (a^2 + b^2) If you have that - then you can show that the difference of distances from each focus of …