**1. What is the difference between a histogram and a bar (column) graph?**

Histograms are used for continuous data such as frequencies of people of a range of heights or weights.

Bar graphs are used for discrete data such as the frequencies of the number of cars of a certain colour.

**2. Can a pie graph be used for all types of data?**

No.

Pie graphs or charts are most suitable for data where proportions or percentages of a total amount are available.

**3. How can the pictures in pictographs be turned into data?**

Each picture represents a certain number of items.