Image caption, Once all eight data points have been plotted give the graph an appropriate title, for example 'Maths and Science assessment marks'. For a positive correlation, as one variable ...

Different types of graph have different uses. A line graph shows how data changes over time. For example, how the volume of traffic changes over a day so you can see the busiest times. A bar chart ...

If a picture is worth a thousand words, how much is a graph worth? For doctors trying to determine whether a patient's blood ...