. Do the numbers on the graph reflect actual search traffic numbers?

10. Do the numbers on the graph reflect actual search traffic numbers?

No. The numbers you see on the y-axis of the Search Volume Index (which you can see after you’ve signed in to your Google Account) aren’t absolute search traffic numbers. Instead, Trends scales the first term you’ve entered so that its average search traffic in the chosen time period is 1.0; subsequent terms are then scaled relative to the first term. Note that all numbers are relative to total traffic.
Read more about how we scale and normalize the data.