Direct and Inverse Variation Function :-)
Algebra
Level
pending
if this is a direct variation, k = ?
The answer is -1.
This section requires Javascript.
You are seeing this because something didn't load right. We suggest you, (a) try
refreshing the page, (b) enabling javascript if it is disabled on your browser and,
finally, (c)
loading the
non-javascript version of this page
. We're sorry about the hassle.
1 solution
Since y ∝ k , ( k 2 − 1 ) = 0 . Therefore either k = − 1 or k = 1 . But if k = 2 , then y = 0 ; this is not a proportion, it doesn't even depend on x . So the valid solution is k = − 1 The resulting proportion is y = − 2 x .