Without using a calculator, match each exponential function with its graph. Choose I II III IV  $\displaystyle e^{-x}$ Choose I II III IV  $\displaystyle e^{x}$ Choose I II III IV  $\displaystyle e^{0.5 x}$ Choose I II III IV  $\displaystyle e^{-0.5 x}$

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In order to get credit for this problem all answers must be correct.