Chapter 3: Function Graphing
87
Using the CALC (Calculate) Operations
CALCULATE Menu
To display the
CALCULATE
menu, press
y
/
. Use the items on this menu to analyze the
current graph functions.
value
value
evaluates one or more currently selected functions for a specified value of X.
Note:
When a value is displayed for X, press
‘
to clear the value. When no value is displayed,
press
‘
to cancel the
value
operation.
To evaluate a selected function at X, follow these steps.
1. Select
1:value
from the
CALCULATE
menu. The graph is displayed with
X=
in the bottom-left
corner.
2. Enter a real value, which can be an expression, for
X
between
Xmin
and
Xmax
.
3. Press
Í
.
The cursor is on the first selected function in the Y= editor at the
X
value you entered, and the
coordinates are displayed, even if
CoordOff
format is selected.
To move the cursor from function to function at the entered
X
value, press
}
or
†
. To restore the
free-moving cursor, press
|
or
~
.
CALCULATE
1:
value
Calculates a function Y value for a given X.
2:
zero
Finds a zero (x-intercept) of a function.
3:
minimum
Finds a minimum of a function.
4:
maximum
Finds a maximum of a function.
5:
intersect
Finds an intersection of two functions.
6:
dy/dx
Finds a numeric derivative of a function.
7:
‰
f(x)dx
Finds a numeric integral of a function.
