(1) What does the x-axis of the graph represent? Years Ago
What does the y-axis of the graph represent? Estimated Average Global Temperature (ºC)
Sorry Guest, I don't know if I can be any help for the other two!
2) The pattern appears to be sudden increases and decreases of temperatures
3) According to the pattern for the previous 350000 years, I would predict that there will be remain volatile and will go up and down wildly.