exam Maths Puzzle Numerical Ability

What is the transformational form of (x+2)^2+(y-1)^2=9???
I think it is [1/9(x-2)]^2+[1/9(y+1)]^2=1????????

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exam Other Question

The area A of a triangle with base b and height h is given by A=1/2bh. Find the area when b=29m(meters) and h=18m.


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Which if the following is a function?
[(-4,1),(1,8),(-4,-2)]
[(-4,1),(1,-8),(-2,-2)]
[(-4,1),(1,-8),(1,-2)]