Question

Function $f=\left\{\right(2,3),(5,7),(8,15),(23,29\left)\right\}$ is given.
what are the domain and range of the given function?

• A. Range is {$2,5,8,23$}
• B. Range is {$3,7,15,29$}
• C. Domain is {$2,5,8,23$}
• D. Domain is {$3,7,15,29}

Answer 1

Answer: (B), (C)

Domain is {$2,5,8,23$}

If the function is given as collection of ordered pairs $(x,y)$, then domain of the function is " All the values of $x$" and range of the function is " All the values of $y$"

Here we know the function is $f=\left\{\right(2,3),(5,7),(8,15),(23,29\left)\right\}$
so values of $x$ are $2,5,8$ and $23$ and values of $y$ are $3,7,15$ and $29$.
Hence, Domain of the function is $\{2,5,8,23\}$
And Range of the function is $\{3,7,15,29\}$.