The graph of guilt

{Sawtooth line graph}

Does this graph (glyph) represent
(a) γ-rays from Terry's hamster
(b) Unemployment in Kenya
(c) Liz's guilt pangs
or (d) is it a rough map of the Himalayas?

{Upside down} Answer – it all depends on context.

There once was a young postgraduate
Who found it so hard to concentrate
She just watched TV
Or read theory
Perpetual guilt was her wretched fate.