A) given the function f(x) = -x^2 + 8x + 9, state whether the vertex represents a maximum or
minimum point for the function. explain your answer.
b) rewrite f(x) in vertex form by completing the square.

14

step-by-step explanation:

14 x 3 = 42

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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step-by-step explanation: