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TI-83 Plus Draw Instructions 222
Drawing Tangent Lines
Drawing a Tangent Line Directly on a Graph
To draw a tangent line when a graph is displayed, follow these steps.
1. Select
5:Tangent(
from the
DRAW
menu.
2. Press
†
and
}
to move the cursor to the function for which you want
to draw the tangent line. The current graph’s
Y=
function is displayed
in the top-left corner, if
ExprOn
is selected.
3. Press
~
and
|
or enter a number to select the point on the function at
which you want to draw the tangent line.
4. Press
Í
. In
Func
mode, the
X
value at which the tangent line was
drawn is displayed on the bottom of the screen, along with the
equation of the tangent line. In all other modes, the
dy/dx
value is
displayed.