Question 1195006
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There are many ways to do it.


For example, a traditional way people use just for hundreds years is to sketch the polynomial curves point by point, 
using tables of values, graph paper and pen / or pencil.



Another, more modern way, is to go to web-sites which have plotting tools and use them.


For example, go to web-site www.desmos.com/calculator and use its free of charge  plotting tool.


All you need is to PRINT the formulas of your functions there, and you will get the curves 
plotted in the next second.



Try it . . .


<pre>
Regarding the revenue function R(x) = -0.05x^2+600x,  from the formula you may conclude

that it is a downward parabola with the x-interception points x= 0 and x= {{{600/0.05}}} = 12000

and the symmetry line  x= 6000  half-way between the x-interceptions.



The maximum of this function is at x= 6000, and you can calculate the maximum value (y-coordinate of the vertex)

by substituting x= 6000 into the formula for R(x).
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