Texas Instruments TI-73TP Teachers Guide - Page 38

To find the number of antennas for even larger

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Patterns 33 Activity 6: Major Martian Headache 4. Guide students to see that the rule for making antenna muffs is heads ¦ 2 = number of antenna muffs. Show students how this also can be written as X ¦ 2 =Y. Á The TI-73 displays the multiplication symbol as an asterisk ¦. 5. Ask students: If there are 67 Martians in a community, how many antenna muffs would be needed? 6. On the TI-73, enter X ¦ 2 =Y into the Y= editor. & I M Z 7. Explore for any given Martian community size by first setting up a table of values. a. Access the TABLE SETUP screen. - f (above the ' key) b. Make sure the screen looks like the one shown at the right (TblStart=0, @Tbl=1, Indpnt: Auto, Depend: Auto). 8. Show on the TI-73 a table of values for the equation. - i (above the * key) 9. Move around on the table and find the number of antenna muffs needed for a community of 67 Martians. $ and # 10. To find the number of antennas for even larger communities, go back to the TABLE SETUP screen and change TblStart to a larger amount, such as 1000. - f 11. Display the table. - i © 1998 TEXAS INSTRUMENTS INCORPORATED

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Patterns
Activity 6: Major Martian Headache
33
© 1998 T
EXAS
I
NSTRUMENTS
I
NCORPORATED
4.
Guide students to see that the rule for making antenna
muffs is
heads
¦
2 = number of antenna muffs
. Show
students how this also can be written as
X
¦
2 =Y
.
5.
Ask students:
If there are 67 Martians in a
community, how many antenna muffs would be
needed?
The TI-73 displays the
multiplication symbol as an
asterisk
¦
.
6.
On the TI-73, enter
X
¦
2 =Y
into the Y= editor.
&
I
M
Z
7.
Explore for any given Martian community size by first
setting up a table of values.
a.
Access the
TABLE SETUP
screen.
-
f
(above the
'
key)
b.
Make sure the screen looks like the one shown at
the right (
TblStart=0,
@
Tbl=1, Indpnt: Auto, Depend:
Auto
).
8.
Show on the TI-73 a table of values for the equation.
-
i
(above the
*
key)
9.
Move around on the table and find the number of
antenna muffs needed for a community of 67 Martians.
$
and
#
10. To find the number of antennas for even larger
communities, go back to the
TABLE SETUP
screen and
change
TblStart
to a larger amount, such as 1000.
-
f
11. Display the table.
-
i