Because they are the same angle and both equal 90 degrees.
If you are trying to find the plot you go up as meany numbers as it says and then go over as meany numbers as it says.
2 kg. Each liter is equal to 1 kg
So I believe you go

and substitute x an y like this
(1-7) (7-1)
and get a slope of -9/6
Sorry If I got it wrong,but I hope I helped
Answer:Thanks
Step-by-step explanation: