Chapter 6 - Exponential Functions and Sequences - 6.4 - Exponential Growth and Decay - Exercises - Page 320: 34

Neither an exponential growth nor an exponential decay.

For $x$. $0+1=1$ $1+1=2$ $2+1=3$ For $y$. $32-4=28$ $28-4=24$ $24-4=20$ As $x$ increases by $1$ and $y$ decreases by $4$. So, the function is neither an exponential growth nor an exponential decay.