Brian's recipe of lemonade requires more water than Alyssa's lemonade recipe.
<u>Step-by-step explanation:</u>
For Alyssa's recipe,
2.5 gallons of water needed for 9 lemons.
So for 36 lemons,
= 10 gallons of water needed
For Brian's recipe,
4 gallons of water needed for 12 lemons,
So for 36 lemons,
= 12 gallons of water needed.
So Brian's recipe needs more water when compared to Alyssa's recipe.