Relatively the same

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.