Idon’t understand what i need to do in this problem , this is my summer math packet for 7th grade

I think I can give you the answer, but I don't think I can explain it very well.

It looks like you are starting out at 2 and progressing to 3. The problem is that the answer has a minus sign after the two.

What I am assuming is that you know what a minus number is and what you do when 2 of them are in a row. If you do, then you should write

2 - -1 = 3

The first box contains -1 and the second box contains 3.

the function makes a strait line horizontally with no x intercept but a y intercept at 9.