By looking at the dots reaching the positive end of the graph and referring to the legend(if applicable)
Time.
If you can trace the graph without lifting your pencil then it is continuous.
graph apex xD
you use a graph to see your progress
Any graph can use percentages.
Graph factor
You use a circle graph when you need to find percentage and/or degrees.
you use a broken line graph usually for showing continuous data (data with growth over time)
Time.
If you can trace the graph without lifting your pencil then it is continuous.
when you can't find any other peice of graph paper
Find out about factors and factor trees.
Use the four-step process to find the slope of the tangent line to the graph of the given function at any point.
graph!
To find the area under a graph, you can use calculus by integrating the function that represents the graph. This involves finding the definite integral of the function over the desired interval. The result of the integration will give you the area under the graph.
graph apex xD
To show continual change from month to month, it would probably be better to use a line graph.