Shannon Tan's answer to Nicole She's Secondary 4 E Maths Singapore question.

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Shannon Tan
Shannon Tan's answer
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The value for a is -1 (hence in the -ve y-axis region). The reciprocal of a function, i.e. 1/f(x), will always have the asymptote y = 0.

*Asymptote refers to an imaginary line which the graph tends toward but never touches