Directly & Inversely Proportionate

Danforth

New member
Joined
Jan 29, 2006
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I'm losing my mind. Any help is very (very, very) much appreciated.
Here are 2 problems:

1) y is proportional to s and inversely proportional to t.

My answer is: y=ks/t (ks is the numerator, t is the denominator)

The book confirms that this is correct.


2) R is proportional to i and inversely propotional to P and t.

My answer is: R=ki/Pt (ki is the numerator, Pt is the denominator)

The book has this as the correct answer: R=k i/pt (only i is the numerator, pt is the denominator; k is in front of the fraction. ie-- three and three fourths: 3 is the whole number in front of the fraction, 3 is the numerator, and 4 is the denominator--k is displayed as the whole number in front of the fraction)

I hope that I explained that somewhat clearly.

My question is, why are these 2 problems different? They are worded the same, but have different answers.

Why is k part of the numerator in the first problem, while it is in front of the fraction in the second problem?

Thanks again for taking the time to read all of this and to help me. I appreciate it very much.
 
It doesn't matter. Either way is correct.
k*(1/2) = k/2
 
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