# Look out!

As you learned in "Could You Survive an Avalanche?" (p. 10), avalanches are dangerous. How deadly are they? Here are some U.S. statistics. Study the data to answer the questions that follow.
```U.S. Avalanche Fatalities By Activities, 1991-2002

Activity 1991 1992 1993 1994 1995 1996
-92 -93 -94 -95 -96 -97

Climbers 7 3 2 6 9 6

Backcountry 7 9 2 7 6 0
skiers

In-area 0 0 0 0 0 0
skiers/riders

Out-of-bound 4 5 0 0 1 0
skiers

Backcountry 0 2 0 1 3 1
snowboarders

Out-of-bound 0 1 0 2 1 0
snowboarders

Snowmobilers 2 2 9 7 5 6

Misc. recreation 2 4 0 1 2 7

Patrollers 0 1 0 1 1 0

Motorists/ 1 1 0 1 0 0
Highway workers

Residents 0 0 0 2 1 0

Others 1 1 0 0 1 2

Total

Activity 1997 1998 1999 2000 2001 Total
-98 -99 -2000 -01 -02

Climbers 3 1 0 2 3

Backcountry 0 3 8 5 5
skiers

In-area 0 1 0 0 0
skiers/riders

Out-of-bound 1 2 5 5 2
skiers

Backcountry 4 4 0 2 0
snowboarders

Out-of-bound 0 3 1 0 4
snowboarders

Snowmobilers 14 13 5 15 18

Misc. recreation 4 4 1 4 3

Patrollers 0 0 0 0 0

Motorists/ 0 0 1 0 0
Highway workers

Residents 0 0 1 0 0

Others 0 1 0 0 0

Total

Source: http://geosurvey.state.co.us/avalanche/US_World_stats/2002-03/
US2002-03.html#ikarstats
```

1. Complete the chart: Calculate the total number of avalanche fatalities in the U.S. by year and by activity.

2. According to the chart above, which year had the greatest number of avalanche fatalities? Which year had the fewest?

3. Which activity saw the highest number of fatalities? On average, how many incidences occurred each year?

4. Use a separate piece Of paper to construct a triple-line graph. Chart the number of avalanche fatalities for climbers, backcountry skiers, and out-of-bound snowboarders from 1997 to 2002. Use a different color to represent each type of activity.

Math and Graphing Skills, p. TE 5
```1.
Activity Total

Climbers 42

Backcountry

skiers 52

In-area skiers/
riders 1

Out-of-bound
skiers 25

Backcountry
snowboarders 17

Out-of-bound
snowboarders 12

Snowmobliers 96

Misc. recreation 32

Patrollers 3

Motorists/
Highway workers 4

Residents 4

Others 6

Total 294

Year 91-92 92-93 93-94 94-95 95-96 96-97

Total 24 29 13 28 30 22

Year 97-98 98-99 99-00 00-01 01-02 Total

Total 26 32 22 33 35 294
```

2. The greatest number of avalanche fatalities occurred between 2001 and 2002, and the fewest number between 1993 and 1994.

3. Snowmobiling rated highest in avalanche fatalities. There were, on average, 8.7 cases per year.