To find out how many scoops of flour Erik needs to bake 36 cookies using unit rates, we first determine how many scoops of flour are needed for one cookie.
Erik used 2 scoops of flour for 12 cookies. We can calculate the number of scoops of flour needed per cookie:
\[ \text{Scoops per cookie} = \frac{2 \text{ scoops}}{12 \text{ cookies}} = \frac{1}{6} \text{ scoops per cookie} \]
Next, we need to find out how many scoops of flour are needed for 36 cookies:
\[ \text{Scoops for 36 cookies} = 36 \text{ cookies} \times \frac{1}{6} \text{ scoops per cookie} = 6 \text{ scoops} \]
So, Erik needs 6 scoops of flour to bake 36 cookies.