(adsbygoogle = window.adsbygoogle || []).push({}); 1. The problem statement, all variables and given/known data

Find the value of k that makes this a probability density function.

The question does not specify whether X and Y are independent or dependent. That is actually another part this question.

2. Relevant equations

Let X and Y have a joint density function given by

f(x,y) =e^(-kX), 0<=X<inf, 0<=Y<=1,

k is a constant, and 0 elsewhere

3. The attempt at a solution

I need quite a bit of direction with this question, I have no idea where to start.

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# Find the constant that makes f(x,y) a PDF

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