Which set of ordered pairs does not represent a function? {(5,–9), (6,-6), (-3,8), (9,-6)}
O{(-6,-4),(4, -8), (-6,9), (1, -3)
O {(1, -1),(-5,7),(4, -9), (-9,7)}
O {(8, –9), (-3, -6), (-4, 4), (1, -5)}

A. find the power of the test, when the null hypothesis assumes a population mean of mu = 450, with a population standard deviation of 156, the sample size is 5 and the true mean is 638.47 with confidence intervals of 95 b. find the power of the test, when the null hypothesis assumes a population mean of mu = 644, with a population standard deviation of 174, the sample size is 3 and the true mean is 744.04 with confidence intervals of 95% c. find the power of the test, when the null hypothesis assumes a population mean of mu = 510, with a population standard deviation of 126, the sample size is 10 and the true mean is 529.44 with confidence intervals of 95