Final answer:
Jane will need 9 lemons and 6 cups of water to triple her lemonade recipe.
Step-by-step explanation:
To triple the lemonade recipe, Jane will need to triple the amount of lemons and water she uses. Currently, she uses 3 lemons and 2 cups of water. To triple the lemons, she will need 3 x 3 = 9 lemons. To triple the water, she will need 2 x 3 = 6 cups of water.