Texas Instruments -84 Plus, Manual Book

Page: 489 / 696

Chapter 17: Activities 486
4. Press
q
2
to select
2:Zoom In
. Use
|
,
~
,
}
, and
†
to move the free-moving
cursor onto the apparent intersection of the functions on the right side of the display.
As you move the cursor, notice that the
X
and
Y
values have one decimal place.
5. Press
Í
to zoom in. Move the cursor over the intersection. As you move the
cursor, notice that now the
X
and
Y
values have two decimal places.
6. Press
Í
to zoom in again. Move the free-moving cursor onto a point exactly on
the intersection. Notice the number of decimal places.
7. Press
y /
5
to select
5:intersect
. Press
Í
to select the first curve and
Í
to select the second curve. To guess, move the trace cursor near the intersection.
Press
Í
. What are the coordinates of the intersection point?
8. Press
q
4
to select
4:ZDecimal
to redisplay the original graph.
9. Press
q
. Select
2:Zoom In
and repeat steps 4 through 8 to explore the apparent
function intersection on the left side of the display.