The annual enrollment of a university for the last nine years is recorded in the table. Year 1 2 3 4 5 6 7 8 9 Students (thousands) 9.5 8 8.5 7.5 6.5 6.5 8.5 8.5 9 What quadratic function best models this set of data?

Afarmer has a large field that is x feet in length. he wants to fence in a rectangular section in the middle of the field , leaving a length of 100 feet of open field behind each end of the fenced rectangle.he also wants the width of the fenced-in space to be 100 feet less than its length. find the expressions to represent the length and width of the fenced section of the field