Answer:
(A) $10 for 25 water bottles
Step-by-step explanation:
You want to know the correct description of a graph showing 10 water bottles cost $4, and cost is proportional to the number of bottles bought.
Graph
From the graph, you can read the cost of 10 water bottles is $4, and the number of water bottles you get for $3 is 7.5. (Eliminates choices B and D.)
The graph also shows you $2 buys 5 water bottles. That means 5×$2 will buy 5×5 = 25 water bottles. (Eliminates choice C.)
Sharon spent $10 to buy 25 water bottles, choice A.