For this we will use equation:
H = starting height + rate_of_growth*periods
We can mark H with index w to represent how many weeks have passed.
Because all of this we can write:
Hw = 200 + 0.5*w
To calculate height after some number of weeks all you need to do is to exchange w with number of weeks.
I think it would be the second option
Substitute everything in first
3(-2)-1-3(-2)
Then simplify
-6-1+6 = -1
The answer is -1
