Answer: 13
Step-by-step explanation:
You draw 13 different coloured dots and change their position
Somebody else had asked this question and they said it was 35 so your best bet is to go with 35
Based on the given problem above, if we analyze it, we are going to look for the graph which with coordinates (0,6) which represents starting out with 6 gallons, and ending at (4,0). So, the graph that best represents this situation would be the first graph on the top left. Hope this answers your question. Have a great day!