Unit 1, Activity 1, Finding Functions in Situations with Answers
Blackline Masters, Advanced Math – PreCalculus
Page 11
Louisiana Comprehensive Curriculum, Revised 2008
1. The distance required to stop a car depends on how fast it is going when the brakes are
applied.
independent variable is speed; dependent variable is distance
There is a formula
d
s
s
=
+
2
20
where s > 0.
Students should realize that the graph
will be found in the first quadrant and should be a curve that is concave up since it
takes more distance to sto, the faster one is going. More information can be found at
http://www.hintsandthings.co.uk/garage/stopmph.htm
2.The height of a punted football and the number of seconds since it was kicked.
The independent variable is time in seconds and the dependent variable is height in
feet. The graph should be a parabola opening down and found in the first quadrant.
3. The volume of a sphere is a function of its radius.
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 Fall '08
 GERMAN
 Calculus, PreCalculus

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