How do you determine if the equation $y = (3)^x$ represents exponential growth or decay?

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Answer 1 · 2016-03-18T15:17:13

y = $b^x$ is an exponential function
if b > 1 it is growing

if b < 1 (and greater than 0 of course), then it is decreasing (decay)

if b = 1, we do not have an exponential function at all, since y = 1 will be a straight (horizontal) line

How do you determine if the equation y = (3)^xy = (3)^x represents exponential growth or decay?