Direct, Inverse, Joint and Combined Variation Direct or Proportional Variation. When two variables are related directly, the ratio of their values is always the same. ... Inverse or Indirect Variation. Inverse or Indirect Variation refers to relationships of two variables that go in the opposite direction (their product is a constant, ). Joint Variation and Combined Variation. ...
Solve direct & inverse variation word problems. By Yay Math. 3/24/10 9:40 PM. WonderHowTo. In this video the instructor teaches about direct and inverse variation. Two variables x and y are said to be in direct variation with each other if you can write them in the form y = K * x. The value of y varies directly corresponding to the value of x.
The keywords' meanings are: directly: things are working together; you are multiplying everything. inversely: things working against each other; you are dividing something somewhere. jointly: many things are working together; you are multiplying lots of stuff.
The cases you’ll study are: Direct Variation, where one variable is a constant multiple of another Inverse or Indirect Variation, where when one of the variables increases, the other one decreases (their product is constant) Joint Variation, where more than two variables are related directly More items...
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