Accuracy Information - Texas Instruments TI-84 PLUS - Graphing Calculator Manual Book

Error Type
WINDOW RANGE
ZOOM

Accuracy Information

Computational Accuracy
To maximize accuracy, the TI-84 Plus carries more digits internally than it displays. Values are
stored in memory using up to 14 digits with a two-digit exponent.
• You can store a value in the window variables using up to 10 digits (12 for
and q ).
step
• Displayed values are rounded as specified by the mode setting with a maximum of 10 digits
and a two-digit exponent.
• displays up to 14 digits in
RegEQ
causes results to be rounded and stored with the specified number of decimal places.
RegEQ
is the center of the leftmost pixel,
Xmin
rightmost pixel is reserved for the busy indicator.) @
adjacent pixels.
• In screen mode, @
Full
calculated as (
Xmax
• If you enter a value for @
calculated as
Xmin
+ @ É... 46.
Xmin X
is the center of the next-to-the-bottom pixel;
Ymin
distance between the centers of two adjacent pixels.
• In screen mode, @
Full
calculated as (
Ymax
( ) à 50.
Ymax N Ymin
• If you enter a value for @
calculated as
Ymin
+ @ ... 30. In
Ymin Y
Possible Causes and Suggested Remedies
A problem exists with the window variables.
Xmax
• You defined
max
• You defined q
• You attempted to define
Tmax
• You defined
• Window variables are too small or too large to graph correctly. You may have
attempted to zoom in or zoom out to a point that exceeds the TI-84 Plus's
numerical range.
• A point or a line, instead of a box, is defined in
ZOOM
• A operation returned a math error.
mode. Using a fixed-decimal setting other than
Float
Xmax
is calculated as (
X
) à 46.
N Xmin
from the home screen or a program in
X
+ @ É... 94. In split-screen mode,
X G-T
is calculated as (
Y
) à 30. In
Ymin G-T
N
from the home screen or a program in
Y
+ @ É... 62. In split-screen mode,
Y Horiz
split-screen mode,
G-T
Xmin Ymax Ymin
 or 
min step 0
 q and q > (or vice versa).
Tstep=0
.
 Tmin Tstep 0
and > (or vice versa).
is the center of the next-to-the-rightmost pixel. (The
is the distance between the centers of two
X
) à 94. In
Xmax N Xmin
is calculated as
Xmax
is the center of the top pixel. @
Ymax
) à 62. In
Ymax Ymin
N
split-screen mode, @
Y
Ymax
is calculated as
Ymax
Appendix B: Reference Information
.
ZBox.
, ,
Xscl Yscl Tstep
split-screen mode, @
G-T
screen mode,
Full Xmax
is the
Y
split-screen mode, @
Horiz
is calculated as
screen mode,
Full Ymax
is calculated as
+ @ É ... 50.
Ymin Y
,
Float
is
X
is
is
Y
is
398