If 18/6=3, then we divide 15/3=5, therefore, x=5
For this case we have a function of the form
where:

We must find the value of the function when
. So:

By definition we have to:

Thus, the value of the function is 
Answer:

Answer:
The answer is C or x=-4.
Step-by-step explanation:
I hope this helps!
Answer:
I think it's {3, 6, 12, 18}
Step-by-step explanation:
Domain: all x-values that are to be used (independent values).
So we can make an equation for this, being 7=1/3x, as that effectively says she can make 3 drawings per page.
Knowing this, we can multiply it by 3 to get x=21 (since if she can draw 3 drawings per page, we can imagine that if each drawing took a page she would need 3 times the pieces of paper), therefore she can make 21 drawings.