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- Thread starter Norukine
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When the graph touches x axis at x = xView attachment 28801

Hi, I'm currently IBDP AA maths SL, and I was wondering if anyone could give me a hadn't with solving this question. Thank you!

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Do you understand what these wordsView attachment 28801

Hi, I'm currently IBDP AA maths SL, and I was wondering if anyone could give me a hadn't with solving this question. Thank you!

(b) is exactly the same. Since the vertex of the parabola is at (-4, 1) we can write it as y= a(x- (-4))^2+ 1= a(x+ 4)^2+ 1. It passes through (1, 4) means that when x= 1, y= 11 so 11= a(1+ 4)^2+ 1. So what is a? And then what is the equation?