The data set shown has a mean of 34 and a standard deviation of 9. How many of these data points have a z-score less than 0.7? (20,22,24,28,33,35,38,40,42,45,47)

f(x) has value 150 at x= 0

and 0 at x= 3

so d(f(x))/dt = slope = -150/3 = -50

first, we define the variables:

x: number of years after 1950

f (x): amount of vinyl sold.

then, with the variables defined, we have:

68594 vinyl records were sold in 1958 > f (8) = 68594

91299 vinyl records were sold in 1961 > f (11) = 91299

38720 vinyl records were sold in 1952 > f (2) = 38720

161743 vinyl records were sold in 1967 > f (17) = 161743

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the shape,the size and the distance

answer: it's upside down and i can't read it

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