If two variables are directly
proportional, then as one variable (*x)* increases, the other changes
proportionally. A graph of this function will produce a straight
line. The equation is y = kx. |
If two variables are inversely
proportional, it means that as one variable (*x)* increases, the
other variable (*y*) decreases. A graph of this function will
produce a hyberbolic curve. The equation is xy
= k, or y = k(1/x) |