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SAT Math Practice Question #15692 - SATify | SATify

#15692

functions

exponential

medium

75 sec

The exponential function $k$ has values shown in the table below. Which equation defines $k$ ?

$k (x) = 2^{x}$

$k (x) = 4^{- x}$

$k (x) = (\frac{1}{2})^{2 x}$

$k (x) = 4^{x}$