Texas Instruments TI-73VSC Teachers Guide - Page 40

The Dolphin

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Activity 7 The Dolphin 35 Geometry ♦ plotting ordered pairs ♦ connecting line graphs (xyLine) Materials ♦ dolphin picture overlayed on a grid (provided) ♦ transparency of provided dolphin picture ♦ grid paper ♦ TI-73 ³ Students use ordered pairs to reproduce a picture of a dolphin on the TI-73 screen, and then set up an appropriate viewing window. Setup ♦ On the grid paper, demonstrate how to draw the x- and y-axes. ♦ Have students draw and label the x- and y-axes on their papers. Ask: What do we call the intersection of the x- and y-axes? (the origin) ♦ Have students label the origin on their graphs. (0,0) ♦ Review how to graph points on the coordinate grid. Begin at the origin. Ask: How do I graph (2,5), (5,2), (-2,5), (5,-2), (2,-5), (-5,2), (-5,-2)? © 1998 TEXAS INSTRUMENTS INCORPORATED

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35
© 1998 T
EXAS
I
NSTRUMENTS
I
NCORPORATED
Activity 7
The Dolphin
Students use ordered pairs to reproduce a picture of a
dolphin on the TI-73 screen, and then set up an
appropriate viewing window.
Geometry
♦
plotting
ordered pairs
♦
connecting line graphs (xyLine)
Materials
♦
dolphin picture overlayed on a grid
(provided)
♦
transparency of provided dolphin
picture
♦
grid paper
♦
TI-73
³
Setup
♦
On the grid paper, demonstrate how to draw the
x-
and
y-
axes.
♦
Have students draw and label the
x-
and
y-axes
on
their papers. Ask:
What do we call the intersection of
the x- and y
-axes?
(the origin)
♦
Have students label the origin on their graphs. (0,0)
♦
Review how to graph points on the coordinate grid.
Begin at the origin. Ask:
How do I graph (2,5), (5,2),
(-2,5), (5,-2), (2,-5), (-5,2), (-5,-2)?