This is false, it is not negative because the answer is 0.
The line that is perpendicular to the line on the graph is y=3
Answer: negative 6
Step-by-step explanation:
Since at the top of the mountain its already 0 and the degrees drop 3 each hour then multiply -3 by 2 hours and there you go.
perpendicular means negative reciprocal so it would be -1/3