Let
x--------> the number of minutes
y-------> the total liters of water sold
we know that
y=150x
Divide 7,500 by 150
=(7,500/150)=50 minutes
Check
For x=50 minutes
Find the value of y
y=150*(50)=7,500 liters of water sold------> is ok
Find the domain
The domain will be the interval------> [0,50] minutes
Find the range
The range will be the interval------> [0,7,500] liters of water sold
