Kevin Trenberth wrote the following text:
Click the image above to zoom in.
You see a graph that seems to be a graph of some temperatures. You see that the maximum that the temperature has reached on this graph is slightly above 0.7 °C. On the horizontal axis, you see 8 cells. Your task is to guess the value of the temperature now, pretty much in the middle of the next, 9th cell (the first one on the right side that isn't shown on the graph anymore).
The function seems to be increasing, right?