Answer:
c
Step-by-step explanation:
Solve the inequality, that is
18 > 3x - 3 ( add 3 to both sides )
21 > 3x ( divide both sides by 3 )
7 > x, hence
x < 7
< is denoted by an open circle on the number line at 7, meaning that x cannot be equal to 7. Since less than 7 then the arrow head points to the left of 7
This is represented by Graph c
