Recording and representing data continued...
Warm up - Practise your doubles and halves with the daily 10
Main Lesson - Today we are going to continue to look at data and now start looking at block graphs.
Q.What is a block graph?
Q. What is the difference between a block graph and a tally chart?
A Block Graph is a simple chart which displays units of data with blocks. Block Graphs have two axes and are a common method of recording information in Maths.
Block Graphs are characterised by:
Here is an example below of a blank block graph.
Top Tip - Remember the Y axis goes up (Y to the sky) which means the X axis goes along the bottom
As you can see from the example above there is lots of labelling on a block graph. I want you to have a go at making your own block graph using the data you have collected on your tally chart from yesterday's lesson.
Follow these steps below to help you create your graph and input your data
Steps in the Process
Decide on a title for your graph i.e. favourite fruits, favourite animal etc.
Draw the vertical (Y) and horizontal (X) axes.
Label the horizontal axes i.e. Type of fruit, Type of animal .
Write the names where the bars will be.
Label the vertical axes (Number of people).
Decide on the scale. You should consider the least and the greatest number shown on your tally chart. Think about what range of numbers should be shown on your bar graph. Always begin at 0 and count by 1s to 20 or maybe in 2's to 20 or maybe in 5's to 25).
Draw a bar to show the total for each item.
Take care drawing out your graph and remember to count carefully so that your data is accurate.