Lisa adds 2 teaspoons of baking soda to 6 pounds of flour. How much baking soda should she add to 9 pounds of flour?
A. 3 teaspoons
B. 27 teaspoons
C. 9 teaspoons
D. 18 teaspoons
To find the amount of baking soda Lisa should add to 9 pounds of flour, we can use a proportion:
2 teaspoons / 6 pounds = x teaspoons / 9 pounds
Cross-multiplying, we get:
6 pounds * x teaspoons = 2 teaspoons * 9 pounds
6x = 18
Dividing both sides by 6, we find:
x = 3
Therefore, Lisa should add 3 teaspoons of baking soda to 9 pounds of flour, which is answer choice A.