3.000 2.500
3. A group of hikers is progressing steadily
along an uphill trail. The graph shows their
elevation (or height above sea level), in
feet, at each distance from the start of the
trail, in miles
2,000
elevation (feet)
1,500
1,000
500
6 8 9
distance along trail (miles)
a. What is the slope of the graph? Show your reasoning.
b. What does the slope tell us about this situation?
c. Write an equation that represents the relationship between the hikers' distance
from the start of the trail, x, and their elevation, y:
d. Does the equation y -250x = 500 represent the same relationship between
the distance from the start of trail and the elevation? Explain your reasoning,