Operation Manual

TI-83 Plus Function Graphing 148
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
~
.
zero
zero
finds a zero (x-intercept or root) of a function using
solve(
. Functions
can have more than one x-intercept value;
zero
finds the zero closest to
your guess.