Answer: Line graph
Step-by-step explanation:
The line graph is used to show the dependence relation of one variable on another.
It shows how the value of the dependent variable [labelled on y-axis] varies as the value of the independent variable [labelled on x-axis] changes.
Therefore, the second option is correct.
Hence, line graph is the graph which is used to show change in a given variable when a second variable is changed.