Question

unit 4 - pie charts and histograms
question 4, 7.1.15
hw score: 28.95%, 11 of 38 points
points: 0 of 1
the pictograph shows the annual number of wildfires in a region between 2000 and 2005. what was the average annual number of wildfires from 2003 to 2005?
the average annual number of wildfires was from 2003 to 2005.

Explanation:

Step1: Count symbols for 2003 - 2005

2003 has 8 symbols, 2004 has 9 symbols, 2005 has 6 symbols.

Step2: Calculate total number of symbols

$(8 + 9+6)=23$ symbols.

Step3: Multiply by value of each symbol

Each symbol represents 12000 fires. So total number of fires is $23\times12000 = 276000$ fires.

Step4: Calculate average

There are 3 years. Average is $\frac{276000}{3}=92000$ fires.

Answer:

92000