Final answer:
The parts required to have a complete line graph are Title and Axes. The intervals on the axes must be equally spaced and counted.
Step-by-step explanation:
The parts required to have a complete line graph are Title and Axes. The title provides information about the graph, while the axes represent the variables being measured. The intervals on the axes must be equally spaced and counted to ensure accurate representation of the data. This allows for clear and precise measurement and comparison of the values being plotted.