A line graph shows changes (or trends) over time.
There is no such thing as 'devolution'. Evolution is defined as genetic change over time. Change, even when it is observed that morphological attributes evolve that are similar to attributes that have been present earlier on in that lineage, has only one direction: forward in time.
No.
Line
a bar graph
its ok if not and okay if yes.
A line chart.
No, a line graph shows data over time.
No. It displays parts of a whole.
a line graph
Line and Scatter
Either one of a scattergraph, a line graph or a bar chart can show trends over time.