Joe's Pizzeria sells pizzas topped with olives. To stay within budget, the number of olives on each pizza is given by the equation v = 8s, where v is the number of olives and s is the number of pizza slices. There are olives on 6 slices of pizza, and there are 72 olives on slices of pizza. What is the total number of pizza slices?
1) 8
2) 9
3) 10
4) 11
