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From the solution provided from this link: https://www.coursehero.com/tutors-problems/Statistics-and-Probability/43900032--Qn-8-Show-that-if-EY-X-a-bX-then-covX-Y-b-and-a-/ Where were these taken or calculated: Similarly, we have E[XY] = E[E[XY|X]] = E[aX + bX^2] and
From the solution provided from this link: https://www.coursehero.com/tutors-problems/Statistics-and-Probability/43900032--Qn-8-Show-that-if-EY-X-a-bX-then-covX-Y-b-and-a-/
Where were these taken or calculated:
Similarly, we have
E[XY] = E[E[XY|X]] = E[aX + bX^2]
and
Therefore, we have
bE[X^2] - bE[X]E[X] = E[XY] - aE[X]
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