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Step & Key Operation Display
EL-9900 Graphing Calculator
Notes
3-2
View the graphs.
These lines have slopes that
are negative reciprocals of
each other (m = - ). They are
called perpendicular. Note that
these intersecting lines form
four equal angles.
2-2
The Graphing Calculator can be used to draw parallel or perpendicular
lines while learning the slope or y-intercept of linear equations.
1
m
GRAPH