



 
Hi Crystal, You are correct Crystal. I have been guilty of that myself, saying that if x is directly proportional to y then if x increases so does y. I think what I should be saying is that if the magnitude of x increases then the magnitude of y increases. By the magnitude I mean the absolute value. Similarly if x is inversely proportional to y then as the magnitude of x increases the magnitude of y decreases. Harley  


Math Central is supported by the University of Regina and The Pacific Institute for the Mathematical Sciences. 