Answer
See graph
Work Step by Step
$$2x^2+2y^2=18$$
$$x^2+y^2=9$$
The center is (0,0) and the radius is 3.
Points to plot are:
$$(3,0)$$
$$(-3,0)$$
$$(0,3)$$
$$(0,-3)$$
Plot these points and connect with a circle.
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