The graph shows $y=\dfrac4{x^2}$, where $x\ne0$. Read the two values of $x$ when \(y

Question

The graph shows $y=\dfrac4{x^2}$, where $x\ne0$. Read the two values of $x$ when $y=1$.[1] Explain why the graph has no points below the $x$-axis.[1] Kai says this is the graph of $y=\dfrac4x$. Use one point to show that Kai is wrong.[2]

Accepted Answer

(a) $-2,2$. (b) $\dfrac4{x^2}>0$. (c) For example, $(-2,1)$ is not on $y=\dfrac4x$.

Reading a reciprocal-square graph

Reading a reciprocal-square graph

Solution:

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