$if\ a\ polynomial\ f\left(x\right),\ f\left(a\right)=0\ then\ \left(x-a\right)\ is\ a\ factor\ of\ f\left(x\right)$

$f=\left\{\left(2,4\right),\left(3,5\right),\left(5,7\right)\right\}\ then\ f^{-1}=\left\{\left(\text{4,2}\right),\left(5,3\right),\left(7,5\right)\right\}$

$both\ are\ correct$

$both\ are\ wrong$

 $\left\{\left(1,3\right),\left(2,4\right),\left(3,5\right)\right\}$  

 $\left\{\left(3,1\right),\left(4,2\right),\left(5,3\right)\right\}$  

 $\left\{\left(1,2\right),\left(2,3\right),\left(3,4\right)\right\}$  

 $\left\{\left(2,1\right),\left(3,2\right),\left(4,3\right)\right\}$  

 $8x-1$  

15

14

17