Final answer:
To create a graph comparing actual temperature changes over time, arrange the data with years in one column and actual temperatures in another. Choose a graph type, update labels, and save the graph image. This type of graph is called a time series graph.
Step-by-step explanation:
To create a graph comparing actual temperature changes over time using a spreadsheet software, you need to arrange the data with the years in one column and the corresponding actual temperatures in the next column. Then, highlight both columns and choose the graph or chart type of your choice. Finally, update the labels and save an image of the graph. This graph is known as a time series graph, which displays the changing temperature as time progresses.