10. What is the equation of the line shown on the graph? у
10
9
8
7
6
5
4
3
27
1
1 2 3 4 5 6 7 8 9 10
-10-9-8-7-6-5-4-3-2-10
-1+
-2
-3
-4
-5+

Sound travels about 750 miles per hour. a) suppose it takes about 1.5 seconds to hear the echo. how far away is the canyon wall, in feet? for this i got 825 ft b) suppose you stand 1,925 feet from the canyon wall and sound the horn. how long will it take to hear the echo? (i'm stuck on this)