Mr. Gray shaded the model to show the amount of fertilizer he used for one winter treatment from a 9 oz. Bottle.
How much fertilizer would mr. Gray use if he made enough mix for 3 treatment
I'm honestly not too sure what exactly the question was implying, which means it could have been written better. I believe they are asking for you to multiply! So it would be 9*3, which would be 27. (3+3+3)