The production possibilities frontier curve can be used to illustrate production levels, what does it mean to operate beneath the PPF curve?
A. failing production levels only
B. increase in inefficiency only
C. falling production levels and increase in efficiency

Efficiency is an action of doing something. for example when you take a test. good efficiency means you did well but bad effeciency or no effiency means you did bad.

There is no graph to look at on here, but i shall explain them to you. a line graph is just in its title it’s a graph with a line running through the dots to show an increase or decrease. a bar graph is used to show how much or how little something is so a comparison. a scatter plot is used to graph points to tell the data. and i don’t know what a histogram is.