The two regression lines of a bivariate distribution are: 4 – 5 + 33 = 0 and 20 – 9 – 107 = 0. find the variance of y when = 3. Compute the correct answer to one decimal place.

Output Format
In the text box, enter the floating point or decimal value required. Do not lead any leading or trailing spaces. Your answer may look like: 7.2

This is NOT the actual answer - just the format in which you should provide your answer.