Eric Nicholas K's answer to Belle's Year 10 Malaysia question.

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Eric Nicholas K
Eric Nicholas K's answer
5997 answers (Tutor Details)
The nice thing about this question is that due to the symmetric properties of a quadratic curve, the gradients are also symmetric.

Both the slopes have a gradient value of 11 at the same “height” y = 5, just that one of the slopes is going down (gradient is -11) while the other is going up (gradient is 11).