Answer:
Step-by-step explanation:
5/4 is your slope.
5-0= 5
4-0= 4
slope is chang in y over change in x. Your first point is (0,0) and you second is (4,5).
-45 - 9n = -81
-9n = -81 + 45
-9n = -36
n = -36/-9
n = 4
Hope this helps you. :)
Answer: The string of lights will have to be 144 inches long