Direct and inverse

Dear student
Your question is not clear and appears to be incomplete.
I am doing as per my knowledge  and assuming we have to tell whether theexpression y=3x is in direct propotion or invserse proportion.

For direct variation, use the equation y = kx, where k is the constant of proportionality. For inverse variation, use the equation y = k/x, again, with k as the constant of proportionality. 
Here k=3
So, y=3/x is inversely proportional.
 word 'proportion' and  'variation,'  means the same thing.

  • 1
What are you looking for?