Answer:
x - y = 0
Explanation:
Create an xy table
x y
1 1
2 2
3 3
4 4
5 5
6 6
7 7
8 8
9 9
10 10
This is true because whatever x is, y must be subtracted from it to equal 0.
When you plot the coordinates on the line, you will eventually get the line in the picture.
