A line graph would be best for this task of visualizing how the actual temperature changed from 1880 to 2016.
Line graphs are particularly useful for showing the trend of data over time. Since the task is to show the change in temperature over a period of 136 years, a line graph would be the most appropriate choice as it allows you to plot the temperature values on the y-axis and the years on the x-axis, creating a clear representation of the change in temperature over time.
A bar graph could also be used, but it would require a lot of bars for each year, making it harder to compare and identify the trend over time. A pie chart would not be suitable for this task because it is used for comparing parts of a whole, rather than showing trends over time. A scatter plot could also be used, but it would not be as clear as a line graph in showing the change in temperature over time.
In summary, line graph is the best choice for this task because it is a clear and simple way to represent data over a period of time, and it allows for easy comparison of the temperature values at different points in time.