The intervals are usually of equal size because that is less confusing. However, bar charts are used for many purposes where trends in time are not involved.
the advantages fo using a line graph is that is shows trends over time and with a bar chart it shows ammount
Line
Generally, pie charts do not indicate trends. Line, bar and column charts are better for trends. They are designed to show how something is split up, so it does not have that purpose, so the answer would normally be no. However, a pie chart could indicate a trend if there was a pattern in the successive slices, like if each was getting larger and each represented a time period, like a month. A few pie charts shown together could also indicate a trend, by looking at how the same data changes from chart to chart.
Pie chart it is used for percents of a whole, no time included.
No. It displays parts of a whole.
Line chart
A line chart.
Either one of a scattergraph, a line graph or a bar chart can show trends over time.
It allows you to visualize and compare trends of data over intervals of time.
A line chart would be the best chart to do that. However, it could also be done with a bar or column chart. You can also add trendlines to them to help show a trend.