Slope Fields

This web applet is slightly adapted from one posted by Ken Schwarz on GeoGebraTube. See https://www.geogebratube.org/user/profile/id/3185 for this and several other useful examples by Ken Schwarz.
Type in a function for f'(x,y) in x and/or y in the dy/dx input box. Set the window with the xmin, xmax, ymin, ymax, segment length, and spacing. Click and drag the starting point to set the initial point and show a graphical solution. Note also that the method used to graph the solution (Euler's Method) can fail if it encounters a point of vertical slope. If the graph suddenly takes on a random, spiky character, it's likely that the computation has hit such a snag.