What is shown
on the horizontal axis?

What are the units used?

How (using what methods)
can the scientists measure this
parameter?nbsp;

What is shown on the vertical
axis?

How (using what methods) can
the scientists measure this
parameter?nbsp;

Which of the two parameters is
harder to measure?nbsp;

What are the dimensions of the
parameter, represented by the
slope of the graph?nbsp;

What is the parameter,
represented by the slope of the
graph?nbsp;

What would be the dimensions
of the parameter that is the
inverse of the slope of the
graph?

Can we use it to study the
Universe? If yes - how, if no -
why?nbsp;