Question q-x-32

2.1 Nonlinear Functions - Exponential growth and decay functions
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q(x)=32(2x)

Which table gives three values of x and their corresponding values of q(x) for function q ?

A.
B.
C.
D.

q ( x ) = 32 ( 2 x ) Which table gives three values of

Hard-difficulty · SAT Math · Nonlinear Functions — Exponential growth and decay functions. Read the question above, select your answer, and check the full explanation below to understand exactly why the correct choice works.

Answer explanation

Choice D is correct. Substituting -1 for x in the given function yields q-1=322-1, which is equivalent to q-1=3212, or q-1=16. Therefore, when x = -1 , the corresponding value of qx for function q is 16 . Substituting 0 for x in the given function yields q0=3220, which is equivalent to q0=321, or q0=32. Therefore, when x = 0 , the corresponding value of qx for function q is 32 . Substituting 1 for x in the given function yields q1=3221, which is equivalent to q1=322, or q1=64. Therefore, when x = 1 , the corresponding value of qx for function q is 64 . Of the choices given, only the table in choice D gives these three values of x and their corresponding values of qx for function q .

Choice A is incorrect. This table gives three values of x and their corresponding values of qx for the function qx=322x.

Choice B is incorrect. This table gives three values of x and their corresponding values of qx for the function qx=232x.

Choice C is incorrect and may result from conceptual or calculation errors.