They are all adding up by 2.15 because you do 8.45 - 6.3 which u get 2.15 so then you do 4.15 + 2.15 and you get 6.3 so the other blanks is 10.6 and 12.75
Fifty nine and eighty three thousandths
Note that the line is a horizontal line, passing through the point (0, 1) in the y-axis.
All points of this line have 1 as their y-coordinate. That is, this line contains points like (-3, 1), (-1, 1), (5, 1), (17, 1)... etc.
Thus, this is the line where y is always 1, this is the line y=1.
Answer: y=1