Answer:
(4) f(x) = 1250(0.8)^x is the answer
Explanation:
It can be seen that the original price you paid was $1250
After 1 year it was 1000
2 years is 800
3 years is 640
So obviously it's losing value.
But how much value?
We can find how much percentage they are losing by doing this:
1250 x 1.2 or .8 since these are you answers
1250 x 1.2 = 1500, from this we can determine that this answer is WRONG!
The value is going down, and not going up so therefore
It must be
1250 x .8 because when those are multiplied together
You get 1000!
Then 1000 x .8 = 800
800 x .8 = 640!
So we can determine that (4) Is the correct answer.
Hope this helped!