In 2004 there were approximately 6960 cinema sites. In 2000 there were 8400 cinema sites. a. Write an equation describing this relationship. Use ordered pairs of the form (years past 2000, number of cinema sites). y= -360x+8400 (Type an expression using x as the variable.) b. Use this equation to predict the number of cinema sites in 2009. The number of cinema sites in 2009 was