What is the horizontal scale of your graph? It goes from 1860 to 2000 in incriments of 20 years.
What is the vertical axis showing? The temperature in degrees C.
What are the units? It goes up by .2 degrees C.
What is the total range shown? The increasing temperature from -.6 to .6 degrees C.
Can you tell from the host's page where the data came from? I couldn't tell, result was "Page not Found." But it looks very exact, so I'm guessing from some educational or governmental site.
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