Final Answer:
The weight of a pig in pounds as a function of its age in days d can be expressed as w(d), where w represents the weight in pounds and d represents the age in days.
Step-by-step explanation:
In function notation, we use the letter f(x) to represent the value of a function f evaluated at an input x. In this case, we want to represent the weight of a pig in pounds as a function of its age in days. Therefore, we can use the following notation:
w(d)
where w represents the weight in pounds and d represents the age in days. This notation indicates that the weight of the pig depends on its age, and that the function w takes the pig's age as an input and returns its weight as an output.