Math 120, Quiz #2
Solutions
(Chapters 45, 10 pts)
1.
(3 pts) Which of the following graphs represent functions?
Circle those that are functions.
2.
(7 pts) Juliet is moving at constant speed in the
xy
plane. She starts
at the point (0, −2)
and heads in a straight line
toward the point (9, 3), reaching it after 10 seconds.
(a)
Write parametric equations for Juliet’s position
t
seconds after she starts walking.
,
(b) When does Juliet cross the xaxis? What is her position at that time?
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 Spring '08
 Staff
 Math, Calculus, 3 pts, 10 pts, 10 seconds, 7 pts

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