As far as I remember, we learned a lot about ratios and fractions, such as adding, subtracting, multiplying, and dividing them, as well as finding LCM and GCF.
Answer:
Step-by-step explanation:
Answer:
Slope: -3/2
With the question, we can determine that the slope with two points: (0,13.5) and (9,0). To calculate use the equation
and get 
This slope means that the water is decreasing at a rate of 3/2 gallons per minute.