Question

Lisa adds 2 tsp baking soda to 6 pounds of flour. How much baking soda should she add to 9 pounds of flour?

Answer 1

If Lisa added 2 tsp of baking soda to 6 pounds of flour, she added 2/6 = <<2/6=1/3>>1/3 tsp of baking soda per pound of flour.
Therefore, for 9 pounds of flour, Lisa should add 1/3 * 9 = <<1/3*9=3>>3 tsp of baking soda. Answer: \boxed{3}.