Write an equation (any form) for the quadratic graphed below

Take regular quadratic equation y = x²
1. see that it's flipped upside down = add negative in front of x²
2. see that the vertex is moved RIGHT 2 = subtract 2 from x
3. see that the vertex is moved UP 3 = add 3 to the end

y = -(x-2)² +3

Answer: r=4.5  feetexplanation: radius  r  is half of the diameter  d,⇒r=d2=92=4.5  feetidk i could be wrong