Mathematics for IGCSE & O level - Proportion (Section 2 - No. 14)
In the formula *y* = *kx*n, if *y* is inversely proportional to *x*3, what is the value of *n*?
-3
-1
1
3
Εξήγηση
If y is inversely proportional to x^3, it means y = k/x^3 or y = kx^-3. Thus n = -3