Solution: The correct option is option B, i.e., a line graph in the coordinate plane hasn't breaks in it is a continuous graph.
Explanation:
Option B is correct.
Reason for correct option:
According to the definition of continuous graph, a graph is said to be continuous if it is an unbroken curve or a curve that hasn't breaks in it.
Reason for incorrect options:
Qualitative graph shows the relation between two elements. For example demand curve shows the relation between price and demand. But it may or may not has breaks in it.
Discrete graph show the separate point on the graph. For example scatter plot. It is not a line graph .
Cosmograph is a chart representation of inputs and outputs.
Therefore, the correct option is option B, i.e., a line graph in the coordinate plane hasn't breaks in it is a continuous graph.
