Question

Which function is an example of exponential decay?

y = 0.3(2)x
y = 4(8)x
y = 5(0.6)x
y = 1.4(3)x

Answer 1

The correct answer is y=5(0.6)^x.
Exponential functions are y=ab^x
Whenever B is less than 1, that's an exponential decay and whenever B is more than one, it's an exponential growth.
I hope this helps.
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Answer 2

For this case we have functions of the form:

`y = A (b) ^ x`

Where

• A: initial amount
• b: rate of change
• x: independent variable
• y: dependent variable

If
`0 <b <1`: the exponential function decreases

if
`b> 1`: the exponential function grows

We have then that the following exponential function decreases:

`y = 5 (0.6) ^ x`

Answer:

an example of exponential decay is:

`y = 5 (0.6) ^ x`

Option C