Question

Maggie is selling candles as a fundraiser. She spent $50 on supplies to make the candles. She plans to sell the candles for $10 each. The functions of her revenues can be modeled by the equation. c (x) = 10x - 50. What is a practical DOMAIN of the function?

Answer 1

D: {0,1,2,3,4...}

Explanation:

c(x) gives her sales revenue, where x is the number of candles sold.

0
`\leq`x
`\leq`10 is not appropriate as she could sell more than 10 candles

All real numbers is not appropriate as she cannot sell a negative (or non-whole) amount of candles.

{-50,-40,-30,-20...} is not appropriate because again she cannot sell negative candles.

Therefore the last option is correct as she can only sell candles in positive integer amounts (or 0).