Our eyes read lines like this: flat line = little change. Inclined line = more change. Steeply inclined line = a lot more change.
It’s all wrong here. You believe right increases more than left. Wrong.
Scales are arbitrary. And don’t go together.
Here it is ok:
Why? Because both scales show the same relative change:
(12-8)/8 = 0.5. And (120-80)/80 = 0.5.
It doesn’t work here:
Source: Süddeutsche Zeitung (SZ), No. 137, 2010-06-18, page 22.
Because scales are arbitrary. And don’t go together. Like in many newspapers, every day. For example in the FTD as well. And. And. And.