Straight or curved

1.Do the horizontal lines below look straight or curved?
Hold something straight up next to them to check.


2.Are the two purple lines parallel or are the bent?

3.Do the solid black lines seem to bend?

4.Look at the red lines, do they appear to be wavy?

They're actually straight, the circles make them appear wavy.

5.Are the lines below straight or crooked?

Hold something straight up next to them to check.