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© 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)?