Question

Write a function rule that gives the total cost c(p) of p pounds of sugar if each pound costs $0.42.

Answer 1

Answer: The function rule that gives the total cost is given by

`C(p)=0.42p`

Explanation:

Let the number of pounds of sugar be 'p'.

Let the total cost would be C(p).

Cost of each pound = $0.42

So, the function rule would be

`C(p)=0.42p`

Hence, the function rule that gives the total cost is given by

`C(p)=0.42p`

Answer 2

Since a pound of sugar increases proportionally to the total cost of sugar bought, then the function can be written as:

c(p) = 0.42p

Where: c(p) = total cost of sugar bought
p = pounds of sugar

c(p) is a function of p, because c(p) depends on p.