Speed = distance / time A line graph with distance on the vertical axis and time on the horizontal axis could be used to determine speed. The speed would equal the slope of the line.
Alternatively, a line graph with distance/time on the vertical axis and time on the horizontal axis would show speed. The acceleration would equal the slope of the line.
Every graph shows comparisons of some kind or another.
Acceleration
pie graph
Bar Graph
A pie or stacked bar.
Any kind of properly drawn graph does. That's what graphs do.
A bar graph shows discreet data, but other types can also.
verbal
Pie chart
Either one of a scattergraph, a line graph or a bar chart can show trends over time.
It shows the past as wel as current scenario....
a scatter plot is one of them.