Use the drop-down menus to describe the key aspects of the function f(x) = –x2 – 2x – 1. The vertex is the . The function is increasing . The function is decreasing . The domain of the function is . The range of the function is

The vertex is the maximum valueThe function is increasing when x < -1The function is decreasing when x > -1The domain of the function is  all real numbersThe range of the function is All numbers less than or equal to zero