Here are a collection of screenshots of Graphulator in action.
The main calculator based user interface.
A graph of sin(x) showing the grid toggled on, and with axis scale lock turned off.
Another graph of sin(x) with the grid, but this time forcing the scale of the x and y axis to be locked together. Notice that the grid is perfectly square.
The table view from the graph page, showing a selection of the actual x and y values.
The settings panel for the graph page.
A graph of a circle.
An interesting graph involving the addition of square roots.