HP Prime Graphing NW280AAABA Add a definition, Modify a definition, Definitional building blocks

Add a definition

With the exception of the Parametric app, there are 10 fields for entering definitions. In the Parametric app there are 20 fields, two for each paired definition.

1.Highlight an empty field you want to use, either by tapping on it or scrolling to it.

2.Enter your definition.

If you need help, see “Definitional building blocks” on page 82.

3.Tap or press Ewhen you have finished. Your new definition is added to the list of definitions.

Note that variables used in definitions must be in uppercase. A variable entered in lowercase will cause an error message to appear.

Modify a definition

1.Highlight the definition you want to modify, either by tapping on it or scrolling to it.

2.Tap .

The definition is copied to the entry line.

3.Modify the definition.

4.Tap or press Ewhen you have finished.

Definitional building blocks

The components that make up a symbolic definition can come from a number of sources.

•From the keyboard

You can enter components directly from the keyboard. To enter 2X2 – 3, just press 2AXjw3.

•From user variables

If, for example, you have created a variable called COST, you could incorporate that into a definition either by typing it or choosing it from the User menu (one of the sub-menus of the Variables menu). Thus you could have a definition that reads F1(X)=X2+COST.

To select a user variable, press a, tap , select User Variables, and then select the variable of interest.

82 An introduction to HP apps