Final answer:
A line graph is easier to detect the effects of the independent variable (IV).
Step-by-step explanation:
A line graph is easier to detect the effects of the independent variable (IV). In a line graph, the independent variable is usually plotted on the x-axis, and the dependent variable is plotted on the y-axis. By observing the change in the dependent variable (y-axis) as the independent variable (x-axis) changes, it is easier to identify and analyze the effects of the IV.