#### Answer

B

#### Work Step by Step

Y is the cost of one pound of cheese and x is the total amount of cheese the caterer receives. The caterer also receives an additional one pound of cheese for free, so one pound needs to be subtracted from the total amount of cheese, or x. In order to find the cost per pound of cheese, the amount spent needs to be divided by the number of pounds of cheese the caterer paid for, which is $x-1$. As a result, the equation to find the cost per pound of cheese would be $y=\frac{75}{x-1}$, or B.