A baker is selling sugar cookies in his shop. He charges $2.00 for 4 cookies. He has a sale over the weekend and charges $0.10 less for each cookie. Write an equation to represent the relationship between the cost of the cookies, y

To determine the cost per cookie during the sale, we start with the original cost per cookie. The baker sells 4 cookies for $2.00, so the cost per cookie is:

\[ \frac{2.00}{4} = 0.50 \]

During the sale, each cookie costs $0.10 less, so the sale price per cookie is:

\[ 0.50 - 0.10 = 0.40 \]

Thus, the equation representing the relationship between the cost of the cookies \( y \) and the number of cookies bought \( x \) during the sale is:

\[ y = 0.40x \]

So, the correct response is:

y = 0.40x