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the altitude of an airplane is represented in the graph
below.
48,000 y
36,000
is the airplane's altitude a function of time?
yes, because any input of time results in only one
output of altitude.
yes, because the airplane increases and decreases
in altitude at the same rate.
no, because each output of altitude has more than
one input of time.
no, because the altitude is constant between 60
minutes and 130 minutes.
altitude (feet)
24,000
12,000
140
40 80 120
time (minutes)
180
intro
done
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