Use the graph to determine the equation of the circle in center-radius form. 10) 10+ 8+ +++ -10 -8- -6 -4 -2 2 4. 6 8 10 x Decide whether or not the equation has a circle as its graph. If it does not, describe the graph. 11) x2 + y2 + 18x + 14y + 211 0 12) x2 + y2 - 2x + 6y 15 = 0 Find the center-radius form of the circle described or graphed. 13) a circle having a diameter with endpoints (-2,8) and (8, 2) Solve the problem. 14) A circle has a diameter with endpoints (-2, 1) and (22, 17). Find the coordinates of the center. Find the center-radius form of the circle described or graphed. 15) 10+ (2, 5) (8, 5) 10 x +++++ +++++

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