Virtual Nerd: What's the Inverse Variation or Indirect Proportionality Formula

Sometimes, it is not always obvious which equations are direct variations and which are inverse variations. In this video, five different equations are considered. Each is manipulated and rewritten to determine whether there is a direct...

In this overview video of direct and inverse variation, Sal shows the general form of each equation and its differences. The listener gains an intuitive understanding of the differences by highlighting how the x and y values vary with...

Indirect variation, indirect proportionality, inverse proportionality, constant of variation, inverse of variation. What's all this mean? How are they related? What are these terms used for? A simple explanation: if one variable...

Discover how to express direct proportionality using equations by watching this tutorial. [2:42]

Direct variation? Constant of variation? Constant of proportionality? Two variables related? If one variable changes what happens to the other variable? What do all these terms have to do with each other? Watch this video as the...

Watch this tutorial to learn about the means-extremes property of proportions that allows you to cross multiply, taking the product of the means and setting them equal to the product of the extremes. [5:59]

Don't panic! There is a pretty simple straightforward formula to solve this problem. Some of the words are a bit overwhelming: indirect variation, inverse, constant of variation, indirect proportionality. But one simple formula and just...

Enhance pupil understanding of proportions and variable relationships by studying direct and inverse variation. Use the idea of a proportional relationship to teach direct variation. Then use a similar pattern to help individuals...

Review your understanding of the power of a product rule before the SAT. This video will give you an explanation along with examples. [4:40]

Review the power of the quotient rule to prep for the SAT. Watch this video and learn how to split an exponent and put it in the numerator and denominator of a fraction using the power of the quotient rule. [4:54]