You multiplied the equation by (x<3). Divide instead. Read this: http://rhf.bradley.edu/~rkremer/tifaq.htm#11.2 >well.. let's say i have y=3. how to u make it so it stops at x=3? i >made an equation like ... y=3 (x<3). >however,it made two lines, this is w/o the axis it makes 2 lines... >if not then the 2nd line blends into the x axis. >why does it do that, and how can i fix it?