A school has collected student enrollment data since it opened. The graph below shows the number of students (y), in hundreds, enrolled at the school each year (x) the school has been open. Which statement best describes the change in student enrollment shown in the graph?

1. according to the internal revenue service, the mean tax refund for the year 2007 was $2,708. assume the standard deviation is $650 and that the amounts refunded follow a normal probability distribution. a. what percent of the refunds are more than $3,000? b. what percent of the refunds are more than $3,000 but less than $4,000? c. what percent of the refunds are less than $2,000?