The following general instructions apply to our graphing calculator and our other graphers.

Graphing Multiple Expressions

To graph multiple expressions in the same coordinate plane, press the » button to open the multi-graph pane, which contains the expression panels, and type your expressions into the expression field of any available panel.

• Add or remove panels: Use the plus (+) button to add more expression panels or the delete (×) button to remove unnecessary ones.
• Show/hide graphs: Select or deselect the checkbox next to an expression to show or hide its corresponding graph.

Graph Accuracy Setting

Select an option in Graph Fineness. This controls how smooth and detailed the graph will be. Higher accuracy creates a smoother curve with more detail but takes longer to graph. Choose the level that best suits your needs.

Evaluating Functions or Parametric Expressions

Where applicable:

1. To evaluate a function or parametric expression, type a number or constant expression in the provided box.
2. The calculator displays the calculated value, rounded to the number of decimal places set by the slider.

Labeling Axes

To label axes, click on the ▼ icon at the top right of the canvas. Type in any number for which you want to label the axes, and press the Label button. You can also use constants like π, or even constant expressions such as 1+3π/2.

Translating the Origin

By translating the origin, you can instantly move to any region in the coordinate plane. First, click the ▼ icon at the top right of the canvas. Then, enter the coordinates where you want to translate the origin into the text boxes labeled O_x and O_y, and press the Translate button. Pressing the Reverse button will move the origin in the opposite direction.

Rotating Axes

Our graphing software offers a unique feature: axis rotation. This allows you to visualize functions, parametric curves, equations, or point sets in the oblique (non-perpendicular) coordinate system. To rotate an axis, click on the ▼ icon at the top right of the canvas, and then enter the angles by which you want to rotate an axis and press the Rotate button. The axis will rotate and the graphs will be redrawn to reflect the rotation. You can also use your mouse to rotate the axes.

Copying & Saving Graphs

1. Click the Copy/Save graph button. This will create a copy of all the graphs on the canvas (graphing area) which will appear as an image below the graphing calculator..
2. Right-click on the image and select the appropriate option from the context menu. Depending on your device and preferences, you might be able to:
   • Copy: Create a copy of the image to your clipboard for pasting elsewhere.
   • Save image as... : Save the image as a file on your device in a chosen format (e.g., PNG, JPG).

Interesting Curves

Graph any of the predefined expressions under the Interesting Graphs selections, located on the multi-input pane, to render some cool Cartesian and polar graphs by selecting it. For best results, you may need to select Graph Fineness as "+1" or higher.

Settings

Press the ⚙ (gear) button to set options (if the button is hidden, first click on the ▼ icon at the top right of the canvas):

• Graph Thickness: Change graph thickness using the slider.
• Angle Mode: Select the angle mode (radians - default, degrees, grades) — you can also change angle modes by using the buttons provided on the top of the Canvas.
• Graphing Mode: If you deselect the Graph as you type option, you will have to press Graph selected expressions, which then appears at the bottom of the calculator, to update the graphs whenever you make any changes to the expressions or the coordinate plane (i.e., move the origin, rotate axes, etc.).
• Automatic Axis Rotation: You have the option to display controls that will automatically rotate the axes.
• Expression History: The software remembers past expressions between visits. You can press Reset Calculator to clear all previous entries.