Answer:
3
Step-by-step explanation:
[tex]y - 3 = n(x - 5)[/tex]
[tex]3 - 3 = n(5 - 5) \\ 0 = n * 0[/tex]
[tex]12 - 3 = n(8 - 5) \\ 9 = n * 3 \\ n = 3[/tex]
