54 Function app
Function app interactive analysis
From the Plot view (P), you can use the functions on
the FCN menu to find roots, intersections, slopes, signed
areas and extrema for a function defined in the Function
app (and any Function-based apps). The FCN functions
act on the currently selected graph.
Display the Plot
menu
1. Display the Plot view menu.
P
To find a root of the
quadratic function
2. Move the cursor so that it is near x= 3.
=or\to select the quadratic
>or<to move the cursor near
Select Root
The root value is
displayed at the bottom of the screen.
Note: if there is more
than one root (as in our
example), the
coordinates of the root
closest to the current cursor position are displayed.
To find the
intersection of the
two functions
3. Find the intersection of the two functions.
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