Answer :
Final answer:
A line graph is the recommended visual format for comparing temperatures in a city over time in a research paper.
Explanation:
For your research paper comparing temperatures in a city over time, the visual format you should use is a line graph. Line graphs are ideal for showing changes over time and are effective in illustrating trends or patterns, such as temperature fluctuations. They provide a clear visual representation of how temperatures have varied throughout different time periods.
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