How to find domain and range from a graph (video) | Khan Academy
Finding the domain and the range of a function that is given graphically. Created by Sal Khan.
Recognizing functions from graph (video) | Khan Academy
If you can draw a vertical line anywhere on the graph and only pass thru one point on the graph at a time, then the graph is a function. The graph in the video fails the vertical line test because …
Reading inverse values from a graph (video) | Khan Academy
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 …
Midline, amplitude, and period review (article) | Khan Academy
Review the basic features of sinusoidal functions: midline, amplitude, and period.
Worked example: Evaluating functions from graph - Khan Academy
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 …
Polynomial functions (article) - Khan Academy
Let's look at the graph of a function that has the same zeros, but different multiplicities. For example, consider g (x) = (x 1) 2 (x 4) . Notice that for this function 1 is now a double zero, …
How to find the range of a function (video) | Khan Academy
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 …
Graphing quadratics: standard form - Khan Academy
Learn how to graph any quadratic function that is given in standard form. Here, Sal graphs y=5x²-20x+15.
Rational functions (video) | Functions | Khan Academy
We break down the definition of the function given in set-builder form and plot the graph by connecting points on the cartesian plane. Domain and Range is calculated through visually …
Graphs of polynomials (article) | Khan Academy
In this lesson, we will use the above features in order to analyze and sketch graphs of polynomials. We will then use the sketch to find the polynomial's positive and negative intervals.