Verified answer

[tex]\displaystyle\bf\\y=\frac{9}{x} \\\\\\1) \ \ x=-3 \ \ \ \Rightarrow \ \ \ y=\frac{9}{-3} =-3\\\\\\2) \ \ x=3 \ \ \ \Rightarrow \ \ \ y=\frac{9}{3}=3[/tex]

Две точки (-3 ; -3)  и  (3 ; 3)

Ответ :  2