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 …

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.

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 …

Oct 18, 2023 · So a more general definition of proportionality is required then, oui? This example, y = x y =−x plays havoc with the intuition of proportionality as increase is met with increase …

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

Find helpful math lessons, games, calculators, and more. Get math help in algebra, geometry, trig, calculus, or something else. Plus sports, money, and weather math ...

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 …

Learn what absolute value means, how to calculate it, and solve absolute value equations. Includes step-by-step examples and a free calculator.

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 …