Finding the domain and the range of a function that is given graphically. Created by Sal Khan.

Learn how to calculate the **rate of change** (also called the **slope**) of a linear function three ways — in a table, on a graph, and as an equation.

Learn how to find the inverse of a function and how to graph it in this video. The inverse function swaps the x and y values of the original function, and the graph of this inverse function is a reflection of the …

The range of a function is the set of all possible outputs the function can produce. Some functions (like linear functions) can have a range of all real numbers, but lots of functions have a more limited set of …

Determine whether the points on this graph represent a function. Now, just as a refresher, a function is really just an association between members of a set that we call the domain and members of the set …

Algebra 1 Lesson 5: Introduction to the domain and range of a function Intervals and interval notation

In summary, to find the period of a function from its graph, identify the repeating pattern, measure the distance along the x-axis between key points of that cycle, and, if applicable, use the function's …

Use the vertical line test to determine if the graph is a function. If you can draw a vertical line anywhere in the coordinate plane and the line only crosses the graph once, then the graph is a function.

Learn how to find removable discontinuities, horizontal asymptotes, and vertical asymptotes of rational functions. This video explores the specific example f (x)= (3x^2-18x-81)/ (6x^2-54) before …

Learn how to graph any quadratic function that is given in standard form. Here, Sal graphs y=5x²-20x+15.