Drawing a bar chart
Drawing a bar chart.
- Label axes, units and scales clearly.
- Bar charts use separated bars; time-series graphs join points in time order.
- Read the key when comparing more than one group.
Example 1
Draw a bar chart.
| Category | Frequency |
|---|---|
| A | 4 |
| B | 7 |
| C | 3 |
| D | 6 |
Total frequency Add all the frequencies.
First frequency 4; total 20.
Example 2
Draw a bar chart.
| Category | Frequency |
|---|---|
| A | 5 |
| B | 7 |
| C | 4 |
| D | 6 |
Total frequency Add all the frequencies.
First frequency 5; total 22.
Your turn
Question 1Given information
Use a consistent frequency scale. Keep equal-width bars with gaps between categories.
Draw a bar chart.
| Category | Frequency |
|---|---|
| A | 6 |
| B | 7 |
| C | 5 |
| D | 6 |
Check answer
Total frequency Add all the frequencies.
First frequency 6; total 24.
Question 2Given information
Use a consistent frequency scale. Keep equal-width bars with gaps between categories.
Draw a bar chart.
| Category | Frequency |
|---|---|
| A | 7 |
| B | 7 |
| C | 6 |
| D | 6 |
Check answer
Total frequency Add all the frequencies.
First frequency 7; total 26.
Question 3Given information
Use a consistent frequency scale. Keep equal-width bars with gaps between categories.
Draw a bar chart.
| Category | Frequency |
|---|---|
| A | 8 |
| B | 8 |
| C | 7 |
| D | 6 |
Check answer
Total frequency Add all the frequencies.
First frequency 8; total 29.
Question 4Given information
Use a consistent frequency scale. Keep equal-width bars with gaps between categories.
Draw a bar chart.
| Category | Frequency |
|---|---|
| A | 9 |
| B | 8 |
| C | 8 |
| D | 6 |
Check answer
Total frequency Add all the frequencies.
First frequency 9; total 31.
Question 5Given information
Use a consistent frequency scale. Keep equal-width bars with gaps between categories.
Draw a bar chart.
| Category | Frequency |
|---|---|
| A | 10 |
| B | 8 |
| C | 9 |
| D | 6 |
Check answer
Total frequency Add all the frequencies.
First frequency 10; total 33.
Draw a bar chart.
| Category | Frequency |
|---|---|
| A | 6 |
| B | 7 |
| C | 5 |
| D | 6 |
Total frequency Add all the frequencies.
First frequency 6; total 24.
Draw a bar chart.
| Category | Frequency |
|---|---|
| A | 7 |
| B | 7 |
| C | 6 |
| D | 6 |
Total frequency Add all the frequencies.
First frequency 7; total 26.
Draw a bar chart.
| Category | Frequency |
|---|---|
| A | 8 |
| B | 8 |
| C | 7 |
| D | 6 |
Total frequency Add all the frequencies.
First frequency 8; total 29.
Draw a bar chart.
| Category | Frequency |
|---|---|
| A | 9 |
| B | 8 |
| C | 8 |
| D | 6 |
Total frequency Add all the frequencies.
First frequency 9; total 31.
Draw a bar chart.
| Category | Frequency |
|---|---|
| A | 10 |
| B | 8 |
| C | 9 |
| D | 6 |
Total frequency Add all the frequencies.
First frequency 10; total 33.