Khan Academy: Center and Spread Lesson

This video lesson from Khan Academy provides practice questions for the Praxis Core Math Test. This section reviews a probability and statistics question connected to the center and spread of data in a collection.

The resource from Khan Academy provides practice questions for the SAT. Watch Sal work through a harder Center, spread, and shape of distributions problem.

The resource from Khan Academy provides practice questions for the SAT. Watch Sal work through a harder center, spread, and shape of distributions problem.

Find the center and major and minor radius of an ellipse given its equation. Students receive immediate feedback and have the opportunity to try questions repeatedly, watch a video or receive hints.

A continuation of the Khan Academy video lesson series on identifying conic sections. This segment goes through examples that cover identifying and graphing both a circle and a parabola. [11:34]

In this four-question quiz, find the center and major and minor radius of an ellipse given its equation.

A video lesson introducing the standard form for the equation of a circle. Starts out with a circle centered at the origin and then discusses the changes to both the equation and the graph when a circle is centered elsewhere. Illustrates...

Video explains the different measures of center: arithmetic mean, median, and mode. Gives examples of finding each measure of central tendency and discusses the effect of outliers on each. Includes a link to additional practice problems....

A video lesson that describes how any three non-collinear points actually define a circle. First it is shown that three points define a triangle. Then it is shown that the circumcenter of that triangle is actually the center of the...

An instructional video that teaches students how to graph a hyperbola that is not centered at the origin. The equation is given in standard form, the asymptotes are determined, and the graph is sketched. Includes a link to practice...