Answer:
![\displaystyle f(x) = [\frac{3}{4}]^x + 5](https://tex.z-dn.net/?f=%5Cdisplaystyle%20f%28x%29%20%3D%20%5B%5Cfrac%7B3%7D%7B4%7D%5D%5Ex%20%2B%205)
Explanation:
All you have to do is plug in some intervals into the function based off of the graph, to make sure your function is authentic.
* Anytime that 
the graph will be <em>falling from the left</em>.
I am joyous to assist you anytime.
Your graph should look like this
B. The line is given from 0 to 8 hours which is the x-axis (domain). and 0 to 175 gallons, which is the y-axis (range).
Hi Kyliebreland!
So, If he saved $5 then we do $20 divided by $5 which gives 4 so now we split 100% into 4 pieces which gives us 25%.
Hope this helps!
