//y varies as cube root of x
clear;
clc;
close;
//y=k*x^(1/3)
y=3;x=64;//given
k=y/(x^(1/3));
mprintf("(1) y=0.75*x^(1/3)"); 
//when y=15/4,x=?
x=(15/4)^3/(0.75)^3;
mprintf("(2) x=%i",x)