In january, a bookstore sells 450 books, but in february, it sells only 300 books. what is the percent of change from january to february?

66.7%
-33.3%
50%
-50%

answer: domain and range mean all possible values of x and y that could be substituted to the inequality. a solution means all possible values that make the inequality statement true. so while the range is still all real numbers, the solution is the shaded area, for which y will always be greater than the line of the function.