The sum of three consecutive integers in 9, find the 3 numbers

Kayla has a $500 budget for the school party.she paid $150 for the decorations.food will cost $5.50 per student. what inequality represents the number of students,s, that can attend the party?

I'm confused on this could anyone me and show me what i need to do to solve it.

In which direction does the left side of the graph of this function point? f(x) = 3x3 - x2 + 4x - 2