Reading Data
10 دقيقة
الشرح
👀 Let's look
A graph shows numbers as pictures.
Read a bar against the scale.
What a graph does
A graph turns numbers into heights so that you can see them. Reading one goes the other way: from a height back to the number it stands for.
Every bar is drawn against the same scale down the side. That is what lets you compare two bars just by looking at them.
Read from the top
Follow the top of the bar across to the scale. The middle of the bar is halfway to the answer, not the answer.
A graph holds nothing but the numbers that went into it. If a group was never counted, no bar can tell you about it.
12
9
14
6
Each bar shows a group.
أمثلة محلولة
Worked exampleRead a bar
How tall is the first bar?
Worked exampleThe tallest
Which bar is the tallest?
Worked exampleAltogether
How many altogether?