Final answer:
The best kind of visual aid to show the increase in the cost of Super Bowl commercials over the past 40 years is a line graph.
Step-by-step explanation:
The best kind of visual aid to show the increase in the cost of commercials during the Super Bowl over the past 40 years would most likely be a line graph. A line graph is effective in representing changes over time, making it suitable for displaying the trend of increasing costs over the years.
Learn more about visual aids for representing data trends