The function M(x) = 5x2 - 160x + 6179 models the number of miles, in millions, US passengers travel on a train for the period of 1970 to 2000,
where x is the number of years since 1970.
Part A: Which equivalent form reveals the minimum number of miles, in
millions, US passengers traveled on a train for the period of 1970 to
2000?

A. M(x) = 5x(x - 32) + 6179
B. M(x) = 5(x - 16)2 + 4899
C. M(x) = 5(x - 32) + 1059
D. M(x) = 5(x - 16)2 + 6435

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7 ft 6 in means 7 1/2, because 6 in is 1/2 of a foot. 7 ft 8 in means 7 2/3 because 8 in is 2/3 of a foot. 23/3 = 7 2/3. 15/2 = 7 1/2.

23/3   *   15/2   = 57 1/2

step-by-step explanation:

- both graphs increase on their domain.

- the graphs of both functions have the same x-intercept.

- neither graph has a y-intercept.