Notice that all the intersections are added at once and that their co-ordinates are automatically displayed.

We will now use the Text tool: b16. Try labelling one of your fixed points by moving carefully to the point––make quite certain that only the point is highlighted and not one of the graphs or axes.

Points, lines and shapes can be drawn and manipulated on the graphing work area and this will be explored in the next tutorial. However, one more thing to try now is putting a grid on the work area. Press b26.

First Steps with TI-Nspire

Tutorial 4: Graphing

Coordinates and labelled points

It’s easy to change the number of decimal places displayed: move the cursor over a displayed value and press - or +.

Analyse Graph Menu

As well as tracing graphs and using the Points tool, important points on graphs can also be identified by using the Analyse Graph tool. We will find the right-hand root of our quadratic function by pressing b61 to activate the zero tool. Then select the quadratic graph by clicking on it with x, you will then be prompted to select a lower bound my moving the cursor somewhere to the left of the desired root and click (x) and then to the right of the root and click again (x).

Lower Bound

There are number of features that can be identified using the Analyse Graph tool, spend some time exploring the other options available by pressing b6.

Upper Bound

© 2012 Texas Instruments Education Technology

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Texas Instruments TINSPIRECX manual Analyse Graph Menu, Coordinates and labelled points