Hiya

Got a question on joint density of two voltages:

f(x,y) = {2, {0<x<1}and{0<y<1-x} 0, otherwise

So I drew what I thought was f(x,y) in plan view (the region {0<x<1}and{0<y<1-x}). Is this correct?

Next question was tow explain if the voltages x and y are independent. It seems to me that they can't be because the joint PDF depends on both x AND y, where as if they were independent it would depend on x OR y. I understand the idea of statistical independence, but not how it translates in the maths.

Thanks very much in advance for any help.