To determine who climbed a steeper mountain, we calculate the slope for both climbers, which is the rise over run.
For Joe:
- Rise: 1200 feet
- Run: 1500 feet
- Slope = 1200/1500 = 0.8
For Bob:
- Rise: 900 feet
- Run: 1000 feet
- Slope = 900/1000 = 0.9
Since Bob's slope (0.9) is greater than Joe's (0.8), Bob climbed the steeper mountain.