Hector’s service club is raising money by wrapping presents in the mall. The function f(x) = 3x describes the amount of money, in dollars, the club will earn for wrapping x presents. They only have enough wrapping paper to wrap 1000 presents.

Question

Describe the domain and range for this problem using appropriate notation.

Domain: 3x < or equal to x < or equal to 1000

Answer 1

Look at what you wrote:

3x <= x <= 1000

Does that make sense?

How about

0 <= 3x <= 1000
0 <= x <= 333.3
or, in terms of whole presents,
0 <= x <= 333

and of course the range is thus

0 <= f(x) <= 1000