The slope is roughly -6/1
I graphed the equation y= -6/1x+4 and it looked pretty similar to the graph on your screen I hope this helps :)
Depending on its position increases its value x10.
EX:
300 30 3 0.3 0.03
The number continually is raised x10 the more you move it to the right and is divided by 10 when you move it to the left
2/5=6/15 and that is less than 7/15
Since ur using i as a imaginary unit, the answer is -11/2 and simplify that and u get -5 1/2.