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For the function ƒ, y = ƒ(x) is inversely proportional to x, where x > 0. If ƒ(3) = 6, what is the value of ƒ(2)?
A. 4
B. 8
C. 9
D. 12
E. 18
Since y = ƒ(x) is inversely proportional to x, it follows that ƒ(x) = for some constant c. You can use ƒ(3) = 6 to find the value of c: = 6, so c = 18.
Therefore, ƒ(2) = = 9.
 
 
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david
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Taken: 78 times
Added: 4/3/2009
Liked: 1 time
Taggged: Math, Mathamatics, SAT
 
 
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