100
Chapter 4: Graphing Features
T_line(
equation, x-value
)
Example
• Draw the tangential line of y
=
x
2
at
x = 1
.
1. Select
T_Line(.
2. Enter “x
2
, 1)” on
the line.
3. Press
E
.
Note: It is also possible to
specify a function
equation from Y0
to Y9 if stored. (T_
line(Y1, 1))
04 V_line
Draws a vertical line on the graph window
From the Calculation
screen
V_Line
x-value
Draws a vertical line (
x = value
) on the graph
window.
Example
• Draw a horizontal line of
x = 3
.
1. Press
@
d
A
0
4
and enter
the value 3.
V_Line
Example
• Draw a vertical line manually.
1. Press
@
d
A
0
4
.
2. Use the cursor navigation keys (
{
}
;
'
) to move the flashing cursor to the appropriate
position.
3. Press
E
to draw the line.
05 T_line(
Draws a tangential line at the specified point of a graph
curve.
From the GRAPH
window
From the Calculation
screen