Question

Plz help i'm stuck !!!!!!!!!

Answer 1

i think its the filled circle pointing this way ---> 

Answer 2

first, you should add -1 on both sides of the equation so yu will have:
9 - 1 ≤ c so 8 ≤ c
now if you wanna show it in the graph you should put a dark dot on 8 and graph a line up to the 8 so your graph is the second one (under the pic) :))
I hope this is helpful
have a nice day