Answer:
Step-by-step explanation:
because it is centered at the origin the equation for the circle is
x^2+y^2=9
lets plug 2x in for y
x^2+(2x)^2=9
3x^2=9
x=3
now lets use the x value to find y
(3)^2+y^2=9
9+y^2=9
y^2=0
y=0
