Texas Instruments TI-83-Plus Guide Book

Chapter 2: Linear Equations Name
Section 2: Using Algebra Date
Topics in Algebra 1 © 2001 Texas Instruments Student Worksheet 2-14
³
Try-It!
é
on Your TI
.
83 Plus or TI-73
Can your calculator check your work? Is
X=2
the solution to the equation
X+3.1=5.5
?
To Do This Press Display
(TI
.
83 Plus shown)
1. Exit the Topics in Algebra 1
application and clear the Home
screen.
From the Home screen, the calculator
can tell you if a sentence is TRUE or
FALSE (
1
=TRUE and
0
=FALSE).
y
l
á
EXIT
â :
2. First, check for the value currently
stored in
X
.
Note
: On the TI
-
73, use
I
rather than „.
„
Í
3. What is the value of
X
stored in your calculator?
Check around the class. Most likely, there are many different values stored to
X
.
4. Next, find out: Is
X+3.1=5.5
true or
false when
X=2
? When you tell the
calculator that
X=2
, this is called
storing a value in
X
.
Note
: On the TI
-
73, use
I
rather than „.
2
X
„
Í
5. Enter the expression
X+3.1=5.5.
This
takes three steps.
a. Enter the first part of the
expression:
X+3.1
.
Note
: On the TI
-
73, use
I
rather than „.
„
\
3
`
1
b. Enter the equal sign (
=
) for
the test.
- | $
until
=
is highlighted
Í
c. Now, complete the sentence
and see the result. Since the
result is
0
(
1
=TRUE and
0
=FALSE), the sentence
X+3.1=5.5
is false when
X=2
.
5
`
5
Í
6. Test another point. Try
X=3
. Is the sentence true or false? What value do you think makes the
sentence true?
Hint
: You do not have to type in the expressions again.
•
On the TI
-
73, press
$
to highlight previous entries, and press
b
to paste an entry on the current line. You can edit
the line and use it again.
•
On the TI
-
83 Plus: y [ displays previous entries. When you get to the one you want, you can edit the line and
use it again.

Texas Instruments TI-83-Plus Specifications

General

Brand	Texas Instruments
Model	TI-83-Plus
Category	Calculator
Language	English