10 gallons blue to 18 gallons red. to find the answer, multiply/divide both 5 and 9 by the same number. In this case, I multiplied them both by two. 5×2=10, 9×2=18.
if you do not understand 2 then here is a explanation you find slope so take any two point then go over then up the amount over is on the bottom and the amount up on top then simplify if needed
