Question 52398
You have the function with U!
Its a rational function.

Remember graphing a linear function,
Using multiple x values to determine the y values, and use both x values and its y values as cordinates in the graph.

So U'r function is

{{{h = 100/(Pi*r^2)}}}
where h, and r are variables.

Substitude some values like -2,-1,1,2 for r. and evaluvate the h values.make a table of values.

Draw the graph with h into Y axis and r into x axis . You will get the graph.Its hyperbola shaped.