What connects a coefficient and a constant

What is the reflection image of (5,-3) across the line y = -x?

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 value of x? enter your answer in the box.