IMathAS-libretexts

For the exponential function $\displaystyle {y}={400}{\left({2}\right)}^{{x}}$ , when $\displaystyle {x}$ increases by 3, how does $\displaystyle {y}$ change?

$\displaystyle {y}$ triples
It depends on how big $\displaystyle {x}$ is.

$\displaystyle {y}$ becomes 8 times as big
$\displaystyle {y}$ becomes 3 times as big

$\displaystyle {y}$ increases by 3200

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