What is the equation of the line in slope-intercept form

Oscar and julie ashton are celebrating their 15th anniversary by having a reception hall. they have budgeted $4,500 for their reception. if the reception hall charges a $90 cleanup fee plus & 36 per person, find the greatest number of people that they may invite and still stay within their budget.

Answer for 10 points show work you guys in advanced < 3

If each bricks costs and he can only buy one brick how much will it cost him to get the material to put around the outside of his garden?