A fish tank is being filled with water. The graph below shows the relationship between the amount of water W (in liters) in the tank and the time T (in minutes) since the tank started being filled.

Question

Amount of water (liters)
W20406080100120140160180200T1234567890
Time (minutes)

(a)Write an equation to represent the relationship between W and T.


(b)Choose the correct statement to represent this relationship.

The fish tank is being filled with 1 liter of water per minute.
The fish tank is being filled with 40 liters of water per minute.
The fish tank is being filled with 1 liter of water per 20 minutes.
The fish tank is being filled with 20 liters of water per minute.

Answer 1

(a) The equation to represent the relationship between W and T is W = 20T.

(b) The correct statement to represent this relationship is: The fish tank is being filled with 20 liters of water per minute.