exam Maths Puzzle Numerical Ability

(4,3),m=7

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exam Other Question

Find the radius of a circular arc of length 12cm that subtends a central angle of radian measure 1.5. What is the transformational form of the quadratic function described by the mapping rule (x,y)> (x+2,3/4y-3)?
I said 4/3y+3=(x-2)^2 but I was marked wrong:(