Answer:
(in the image)
Step-by-step explanation:
I'm not sure I understood your question completely but I hope this helps.
3(-12)-17= 3 times -12 is -36
-36-17= -53
30 dolls.
You can get this by multiplying the number in 20% by 5, which would get you to 100% and 30.
It is a function because every input has exactly one output. It passes the vertical line test.
If you plotted another point at 2 hours it would no longer be a function bc 2 would be an input they had more than one output.