Xis a random independent variable with mean 20 and standard deviation of 5. also suppose that y is a random independent variable with mean of 40 and standard deviation 10. find the variance and standard deviation of the random variable z = 2 + 10x

y > 1/3x

y < = -x + 4

hope this : )

correct choice is b

step-by-step explanation:

when you calculate the average rate of change of a function, you are finding the slope of the secant line between the two points. for the function the average rate of change from point to point can be calculated as

to find the average rate of change from day 2 to day 10, note that at day 2, 8 houses were sold, so a(2,8) and at day 10, 2 houses were sold, so b(10,2). thus,