SAT Math Practice Question #31471 - SATify | SATify

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SAT Math Practice Question #31471 - SATify | SATify

#31471

applications

polynomials

functions

medium

75 sec

A quadratic function $f (x) = a (x - h)^{2} + k$ models the value of a quantity over time $x$ . If $a < 0$ , which of the following statements about the vertex $(h, k)$ is true?

A.

$h$ represents the maximum value of the quantity.

B.

$k$ represents the minimum value of the quantity.

C.

$h$ represents the time at which the maximum value occurs.

D.

$k$ represents the value of the quantity at time $x = 0$ .