Tips and Tricks on Direct & inverse variation


 


1
For direct variation, if the value of x is increased, then y increases as well.
Both variables change in the same manner. If x decreases, so does the value of y. We say that y varies directly as the value of x.



2
A direct variation between 2 variables, y and x, is a relationship that is expressed as:
y = kx
where the variable k is called the constant of proportionality.
In most problems, the k value needs to be found using the first set of data given.



   3
An inverse variation between 2 variables, y and x, is a relationship that is expressed as:
y = k/x
where the variable k is called the constant of proportionality.
As with the direct variation problems, the k value needs to be found using the first set of data.


Login to see more
Practice other most important chapters tips
Basic Geometry
Arithmetic
Mensuration
Trigonometry
and More


 
SimplyLearnt
Sign Up to see Tips and Tricks for Direct & inverse variation