Answer:
y = 22 - 2x
Step-by-step explanation:
Given the following :
Amount of water in salt water fish tank = 22 inches
Evaporation occurs steadily at the rate ; 2 inches per week
The depth y of water in the aquarium x weeks after filling :
The depth of water reduces as evaporation occurs ; and as such reduces by 2 inches per week
Hence,
After x weeks, the depth 'y' of water in the aquarium will be :
y = Initial position of water - 2(number of weeks)
y = 22 - 2x
y = new depth
x = number of weeks
