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Cannot be made any clearer! You are given apparently the equation for a circle. Read the values from the equation and draw the graph! YOU STILL ARE UNCLEAR ABOUT a or A.
You only indicate the equation ;
Be sure you know what your variables used are; x or X?
The values given for some make your equation .
You can graph nothing until you know what is A.
Last guess is that you really have , but you are mishandling variable names. If this last equation were your actual equation, then center is at (5,6) for the circle of radius 4.