Usable keywords: sin, cos, tan, asin, acos, atan, pow, log, sqrt, abs, PI, E. You can also use any JavaScript you like (math functions are in the Math namespace).

Enter x(t) and y(t) into the first two boxes. Enter t₀ and t₁, the bounds on t, into the next two boxes. Finally, specify the plot color in CSS notation (either #hex or a color word) and hit the plot button. In the chart on the left, 'drag' refers to left-clicking on the graph and moving the mouse with the left mouse button depressed. Alternatively, you can make fine adjustments using the arrow keys. Note that f(t) is sampled at discrete intervals (between which is it linearly interpolated), so if you attempt to graph a curve that turns sharply at high speeds, expect some angles. Have fun!