GCalc Screen Shots

Graph of sin(x), -x, and exp(x)

Graph with monotonicity marked. Red means increasing, blue means decreasing.

Graph with concavity marked. The gray lines point down if concave down; the gray lines point up if concave up. Notice -x has no markings since it's neither concave up nor concave down.

The Plugin/Graph properties dialog in GCalc 3

Screen shot of the implicit function plugin. The graph of 0=x^2+y^2-9 and 0=x^2-y^2-9

Graph of the inequalities y>=(x+3)(x-1) and y<x/2+1

Table view of the functions x^2 and sin(x)

Graph of the inequality sin(x^2+y^2)>sin(x)

Graph of the Lokta-Volterra predator-prey model.

dx/dt=-x + x y /10
dy/dt=y - x y/5

A parametric rendering of a pretzel.

x(t)=-4 sin(3t)
y(t)=4 cos(4t)

A polar graph of r(t)=t/10 from t=0 to t=50

Graph of the parametric equations

x(t)=cos(t)
y(t)=sin(t)+t

This is the famous Brachistochrone curve.

Rendering of a part of the Mandelbrot set.

The venerable GCalc 2 applet interface. Features easy access to all graph controls.