# EZ Math Movie, Tutorials, Simple Graphics, The Graph at Startup

### The axes and origin

EZ Math Movie starts out with a normal (x, y) graph visible at startup:

### The bounds and grid

 At startup and throughout most of the tutorials the graph has these bounds: Left most x-coordinate Name: worldXMin Value: -10 Right most x-coordinate Name: worldXMax Value: 10 Bottom most y-coordinate Name: worldYMin Value: -10 Top most y-coordinate Name: worldYMax Value: 10 We will state these bounds with this type of notation: `x:[-10, 10], y:[-10, 10]`

### The graph panel controls

 The top of the graph panel holds some controls and information: Running the program The Go button The Pause button The Resume button The Stop button Displaying the current bounds Changing the bounds

### Changing the bounds

 To change the graph bounds, click the checkbox in the upper left corner and a drop down list of bounds will appear. Use the list and select the bounds that you would like. The notation works this way: x:[worldXMin, worldXMax] y:[worldYMin, worldYMax] After making your selection click the checkbox again to close things up and have your changes accepted.

### Running the example program

The following example program sets up the graph and draws a line segment and a point. Click the 'Go' button on the graph panel to see this. The details of this program will be explained in the following tutorials.

### The example program

0ptions

Go on input

Bounds:
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Printer

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To runtime:

Storage:

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### And....

Next tutorial: Drawing a point

Here is a link to a related article at EZ Programing Demos:

### Other sites you may find interesting

Like Math and Physics?

Zona Land Education offers explanations, diagrams, and animations on these topics.
And it is all presented in a clear and casual manner.

Want to learn about programing computers?

EZ Programing Demos has an animated, slow motion, interactive programing language demonstrator.
The site presents basic ideas at a beginner's level.

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