# How do you determine if the equation #y = 3(0.4)^x# represents exponential growth or decay?

##### 2 Answers

Jul 17, 2016

#### Explanation:

Take a look at the equation:

When

The equation

Look at the graph to confirm exponential decay.

graph{3(0.4)^x [-6.71, 13.29, -2.17, 8.25]}

Jul 17, 2016

The eqn. represents **decay.**

#### Explanation:

We know that, the function

Therefore, the eqn. represents **decay.**