Casio CLASSWIZ CG Software User's Manual page 82

Using Graph Solve (Graph Solve)
You can use Graph Solve to obtain the coordinates of roots, and other values for the integrals, y -axis intercept,
or other key feature points on a graph. For example, perform the operation below to find the root of a function
on a graph.
1. Enter the function in the Function tab and press > to draw a graph.
2. Select T > [Graph Solve] > [Root].
• If there are multiple graphs in the graph window, one of them will flash.
3. Use d and u to move the flashing to the graph whose root you want to obtain and then press O.
• This causes a cross pointer (
appear at the bottom of the window. If there are multiple roots, you can use r and l to move the pointer
to another root.
4. To exit graph analysis, press b.
The values that can be obtained using graph analysis are shown in the table below.
To obtain this value:
Roots on a graph
Maximum value on a graph
Minimum value on a graph
Coordinates of intersection of two graphs
Integral value of the specified range on the graph
Integral value and area
on the graph
*2*4
Integral and area of a range bounded by multiple intersections
of two graphs
*2*5
Integral and area of a range bounded by the intersection of
two graphs and a root on either of them
y -axis intercept
x -coordinate value on a graph for a given y -value
y -coordinate value on a graph for a given x -value
*1 Can be calculated for Cartesian coordinate type (y= f (x) form) and inequality type ( y > f (x), y < f (x), y ≥ f (x),
y ≤ f (x) form) graphs.
*2 Can be calculated for Cartesian coordinate type (y= f (x) form) graphs.
*3 An error occurs if there are more than 21 roots between the two specified roots.
*4 An error occurs if there are more than 21 intersections between the two specified intersections.
*5 You can also use the number keys to specify any x -coordinate value instead of the intersections or roots of
the graph.
*6 Cannot be calculated for parametric type graphs.
Important!
• In the cases described below, solution accuracy may be reduced or solution may be impossible.
) to appear at the coordinates of the root and the coordinate values to
*1
*2*3
of a range delimited by multiple roots
Select T > [Graph Solve] and then
select this:
[Root]
[Maximum Value]
[Minimum Value]
[Intersection]
*2
[ ∫dx ] > [ ∫dx ]
[ ∫dx ] > [Root]
[ ∫dx ] > [Intersection]
[ ∫dx ] > [Mixed]
[y-Intercept]
*6 [x-Cal]
[y-Cal]
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