Match the differential equation to its direction field labeled A - D. You can click on the thumbnail image to open a new window with an enlarged image.

1. $\frac{dy}{dx} = y-1$
2. $\frac{dy}{dx} = y^2 - x^2$
3. $\frac{dy}{dx} = y-x$
4. $\frac{dy}{dx} = y^3 - x^3$

A	B	C	D