Let $A=\{-2,-1,0,1,2\}$ and define the relation $R=\{(x,y)\mid y=x^{2}\}$. The codomain is $B=\{0,1,4\}$. (a) State whether $R$ is a function from $A$ to $B$. (b) Find the range of the function and indicate whether it is onto and/or one‑to‑one.

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Yes, $R$ is a function; its range is \{0,1,4\}; it is onto but not one‑to‑one.

Neco 2019 Further Mathematics Question 36

Let \(A=\{-2,-1,0,1,2\}\) and define the relation \(R=\{(x,y)\mid y=x^{2}\}\). The codomain is \(B=\{0,1,4\}\). (a) State whether \(R\) is a function from \(A\) to \(B\). (b) Find the range of the function and indicate whether it is onto and/or one‑to‑one.

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