N=3
Because 6+6=12
Hope this helps
Well first, you have to know the distance formula. You plug the coordinates into it and you get the answer.

√1² + -7² = d
d = 7.1
Https://www.desmos.com/calculator you can use this calculator just plug the what y= in it and it will show you the graph and the vertex
Answer:
It is B
Step-by-step explanation: