Create bar graphs
key notes:-
1. Introduction to Bar Graphs:
- A bar graph is a way to represent data using bars of different heights.
- Each bar represents a category and its length or height shows the quantity or frequency.
- Bar graphs are used to compare information visually and easily.
2. Parts of a Bar Graph:
- Title: Describes what the graph is about.
- X-axis (horizontal line): Represents the categories being compared (e.g., types of fruits).
- Y-axis (vertical line): Represents the values or frequency (e.g., number of students).
- Bars: Rectangles that show the data. Each bar represents one category.
- Labels: Markings on the axes that explain what they represent.
- Scale: Numbers along the Y-axis that show the units of measurement.
3. Types of Bar Graphs:
- Vertical Bar Graph: Bars go upward from the X-axis.
- Horizontal Bar Graph: Bars extend sideways from the Y-axis.
- Double Bar Graph: Compares two sets of data side by side for each category.
4. Steps to Create a Bar Graph:
- Collect data: Gather information you want to represent.
- Choose a scale: Decide the range of numbers for the Y-axis.
- Draw the axes: Draw the X-axis and Y-axis on graph paper.
- Label the axes: Write the categories on the X-axis and numbers on the Y-axis.
- Draw the bars: For each category, draw a bar up to the corresponding value on the Y-axis.
- Add a title: Clearly indicate what the bar graph shows.
5. Example of Data for a Bar Graph:
A bar graph of the above data would have fruits on the X-axis and the number of students on the Y-axis. The height of each bar would correspond to the number of students who like each fruit.
Learn with an example
1) Reid is 20 years old, Christina is 20 years old, Lillian is 18 years old, Martina is 8 years old, Jennifer is 18 years old and Paul is 14 years old.
Use this data to complete the bar graph below.
Click to set the length of the missing bar.
- The missing bar is for Paul. Set the length of the missing bar to 14.
2) During Environmental Week, the Cheema School District surveyed students to find out whether they rode the bus, biked, walked, carpooled, or rode a scooter to school.
Use the data in the table to complete the bar graph below.
| Getting to school | ||
|---|---|---|
| Mode | Boy | Girl |
| carpool | 500 | 300 |
| ride a scooter | 500 | 1,000 |
| ride the bus | 1,000 | 200 |
Click to set the height of the missing bar.
- In the table, find the carpool row. Find the number in the boy column. 500 boys carpool to school. Set the height of the missing bar to 500.
3) Ashland has 1 school, Columbia has 5 schools and Watertown has 3 schools.
Use this data to complete the bar graph below.
Click to set the height of the missing bar.
- The missing bar is for Columbia. Set the height of the missing bar to 5.
Let’s practice!🖊️
