Respuesta :

Here looking at x in (x,y) pairs

[tex]\\ \sf\longmapsto 8\neq4\neq6\neq 7\neq 2[/tex]

  • Every value has a unique image
  • Hence its a function

[tex]\\ \sf\longmapsto D_f=\{8,4,6,7,2\}[/tex]

[tex]\\ \sf\longmapsto R_f=\{-2,-6,-8,5,4\}[/tex]