# State whether the equation represents exponential growth, exponential decay, or neither. y=0.9^x

Question
Exponential growth and decay
State whether the equation represents exponential growth, exponential decay, or neither. y=0.9^x

2021-02-05
The exponential function: $$\displaystyle{y}={a}\cdot{b}^{{x}}$$ is an exponential growth if b>1 or is an exponential decay if 0 Here, b=0.9 so it is an exponential decay.

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