1) We can write an exponential function as

Since then we can examine our function:

2) Let's set a table to check this rate of change:
x | y
-1 | 408.16
0 | 400
1 | 392
2 | 384.16
3 | 376.47
Note how the va
Since we can rewrite that function as:

We have a decay of 2% per hour since 0.98 is lesser than 1.
3) And the answer is decrease 2% per hour