Texas Instruments TI-83-Plus - Page 51

Chapter 2: Linear Equations Name
Section 1: Using Graphs & Tables Date
Topics in Algebra 1 © 2001 Texas Instruments Student Worksheet 2-4
³
Try-It!
é
on Your TI
.
83 Plus or TI
.
73
(continued)
Solution Search Using X-Y Graphs:
Find the solution for the equation
X+3=1.7
. First, use your
number sense to estimate the solution for
X+3=1.7
. Record your estimate here.
Use the table feature on your calculator to search for the solution (when
Y
1
=Y
2
).
To Do This Press Display
(TI
.
83 Plus shown)
1. Exit the Topics in Algebra 1
application and clear the Home
screen.
y
l
á
EXIT
â
:
2. Set the window format as shown.
Note:
See
³
TIp
é
2:
Adjusting Your Calculator
Settings
for more information. Screens are shown
for the TI
-
83 Plus. There are slight differences on
the TI
-
73.
y
g
3. Enter both sides of the equation into
the Y= editor as shown.
Note:
See
³
TIp
é
3:
Graphing a Function in the
Standard Window
for more information.
Note
: On the TI
-
73, use
I
rather than „.
&
‘
1
`
7
#
‘
„ Ã
3
4. Select
ZDecimal
to set the viewing
window and automatically graph the
functions.
TI
-
83 Plus:
(
4:ZDecimal
TI
-
73:
(
8:ZDecimal
5. Trace
Y
1
=1.7
.
6. Trace
Y
2
=X+3
.
Note
: The function displays in the upper left corner
of the screen; the
X
and
Y
values are displayed on
the bottom of the screen.
r
| or ~ to trace a
function
} and † to move
between functions
7. Find where
X+3=1.7
. What is the solution?
8. How do you know?
9. Did you notice that the value of
X+3
is
1.7
when
X=
M
1.3
?