Answer
Exponential growth.
Work Step by Step
The given function is
$y=(1.4)^{t+8}$
Use product of powers property.
$y=(1.4)^{t} \cdot (1.4)^8$
Evaluate the power and simplify.
$y=(1.4)^{t} \cdot 14.76$
$y=14.76(1.4)^{t} $
$y=14.76(1+0.4)^{t} $
Hence, the function represents exponential growth.
