Early speculation on the sources of cosmic rays included a 1934 proposal by Baade and Zwicky suggesting cosmic rays originated from supernovae. A 1948 proposal by Horace W. Babcock suggested that magnetic variable stars could be a source of cosmic rays. Subsequently in 1951, Y. Sekido et al.
Some graph types such as stem and leaf displays are best-suited for small to moderate amounts of data, whereas others such as histograms are best-suited for large amounts of data. Graph types such as box plots are good at depicting differences between distributions. Scatter plots are used to show the relationship between two variables. Please answer the questions:
Which Graph to Use. Now decide which type of graph would be best to show the relationship between the cost of fighting emergency fires and the year in which the fires occurred. The four types of graphs, you should recall, are bar graph, pie chart, line graph and scatter plot. You decide - remember what each of the four types of graphs are best at showing: Bar graph - compares items and relationships - a groups of things you want to compare.