Answer
Neither an exponential growth or an exponential decay.
Work Step by Step
For $x$.
$1+2=3$
$3+2=5$
$5+2=7$
For $y$.
$4+7=11$
$11+7=18$
$18+7=25$
As $x$ increases by $2,$ $y$ is increases by $7$.
So, the function is neither an exponential growth or an exponential decay.
