1. Confirm or disprove Ernest's work by selecting two different points and applying the slope formula. Be sure to identify the points you chose. (2 points) 2. What does the slope tell you about the rate of change in elevation during Ryan's uphill climb? What was the total elevation change? (2 points: 1 for identifying the rate of change, 1 for the total elevation change)
3. What is the slope of the graph between 120 and 150 minutes? What does this mean in terms of change in elevation? (2 points: 1 for the slope, 1 for the explanation)