Question

time vs. position of battery - operated car
what is missing from the graph?
consistent intervals
grid lines
variables
a best - fit line

Explanation:

• Consistent intervals: The x - axis (Time) has intervals of 5 (0 - 5, 5 - 10, etc.) and the y - axis (Position) has intervals of 1 (0 - 1, 1 - 2, etc.). So consistent intervals are present.
• Grid lines: There are no horizontal and vertical lines (grid lines) that would make it easier to read the values of the points.
• Variables: The variables "Time" and "Position" are labeled on the axes.
• A best - fit line: A best - fit line is not a necessary element for a scatter plot (which this appears to be). It is an optional element used for trend analysis.

Answer:

grid lines