line graph rock
A scatter plot would be best for non-related data points. A line graph would be best for related data points.
When the data on the graph is continuous,it does make sense to connect the points on the graph of 2 related variables.
They make points in space related to each other. Now they are connected in the problem, instead of just points on the graph.
To get data from a graph efficiently, you can use the gridlines and labels on the axes to determine the values of the data points. You can also use a ruler or a straight edge to help you accurately read the data points from the graph.
A discrete graph.
Line graph...
linear graph
Not linearly related.
either a scatter graph or a line graph xx :)
Maths
It depends on what you are trying to do.
A line graph is used to display data over time with points connected by lines. This type of graph highlights trends and patterns in the data.