You throw darts at a dartboard. let event a=the first dart hits the center. let event b = the second dart hits the center. what does p(b|a) represent? does anyone get this?

What is the range of the function? f(x)=-2|x+1|? a. all real numbers. b. all real numbers less than or equal to 0. c. all real numbers less than or equal to 1. d. all real numbers greater than or equal to 1