While exploring a volcano, Zane heard some rumbling, so he decided to climb up out of there as quickly as
he could
Zane's elevation relative to the edge of the inside of the volcano in meters) as a function of time (in
seconds) is graphed
10
15
20
25
30
Elevation (meters)
-157
-20+
- 25+
Time (seconds)
How long did it take Zane to reach the edge of the volcano?
seconds