Răspuns :
[tex]\it f:\mathbb{R}\ \longrightarrow\ \mathbb{R},\ f(x)=-x+3\\ \\ Gf\cap Oy=A(0,\ y) \Rightarrow y=f(0) = 0+3=3 \Rightarrow Gf\cap Oy=A(0,\ 3)[/tex]
[tex]\it f:\mathbb{R}\ \longrightarrow\ \mathbb{R},\ f(x)=-x+3\\ \\ Gf\cap Oy=A(0,\ y) \Rightarrow y=f(0) = 0+3=3 \Rightarrow Gf\cap Oy=A(0,\ 3)[/tex]