Algebra-1

Question Analysis
This question tests the student's ability to interpret a real-world scenario and calculate the slope of a line. The problem provides the vertical and horizontal changes, and the student must apply the slope formula to find the slope, which represents the steepness of the trail.

Key Concept Explanation
The slope of a line is a measure of its steepness and direction, calculated as the ratio of the vertical change (rise) to the horizontal change (run). In this context, the rise is the change in elevation, and the run is the horizontal distance. The formula for the slope is .

Step-by-step Solution
1. Identify the vertical change (rise): 400 feet.
2. Identify the horizontal change (run): 1000 feet.
3. Apply the slope formula:

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