Learn about functions, their properties, and how to work with them in algebra on Khan Academy.

What are rational functions? How do we plot them? What is their domain and range? Let's find out. We break down the definition of the function given in set-builder form and plot the graph …

Shifting functions: Functions Stretching functions: Functions Modeling situations by combining and composing functions (Algebra 2 level): Functions Introduction to inverses of functions (Algebra …

Learn eighth grade math—functions, linear equations, geometric transformations, and more. (aligned with Common Core standards)

The Algebra 1 course, often taught in the 9th grade, covers Linear equations, inequalities, functions, and graphs; Systems of equations and inequalities; Extension of the concept of a …

The Algebra 2 course, often taught in the 11th grade, covers Polynomials; Complex Numbers; Rational Exponents; Exponential and Logarithmic Functions; Trigonometric Functions; …

Regardless of who you are, mastering even just one more skill on Khan Academy results in learning gains.

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An introduction to functions. If you're seeing this message, it means we're having trouble loading external resources on our website. If you're behind a web filter, please make sure that the …

Math: Pre-K - 8th grade; Pre-K through grade 2 (Khan Kids) Early math review; 2nd grade; 3rd grade; 4th grade; 5th grade; 6th grade; 7th grade; 8th grade; Basic geometry and measurement