Tan Xin Ya's answer to Esther Tang's Secondary 3 A Maths question.

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Tan Xin Ya
Tan Xin Ya's answer
3 answers (Tutor Details)
For q22 you cannot assume that the y axis passes thru the origin therefore you cannot take the diameter to be 8 units.
The way to do this question is to sub in the points into the eqn and solve simultaneously.