I don't know if he coined the term, but Dylan used the phrase "bent out of shape by society's pliers" in the song "It's all right, Ma, I'm only bleeding" on the 1965 (?) album "Bringin' it all back home."
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A straight line that goes through the origin.
It is a parabola, which passes through the origin and is symmetric about the y axis.
The PPF is bowed outwards (concave to the origin) as tradeoffs between the production of any two goods are constant.
More information is needed. Please post a new and separate question with the coin's country of origin. Many countries have 50¢ coins.
There is no shift in the PPC.Only a dot is marked within the curve(Not on the curve) in the exact center of the two axes.The shape of the PPC is concave to the origin.