What is the median of the data set: 15, -2, 0, 15, 2, 12

How do you solve a question like 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

What is the equation of the line that is parallel to the line with the equation y= -3/4x +1 and passes through the point (12,-12)