Just need some with this question. the second image is my answer. i'm just confused and really just don't understand how i actually get the answer. any would be appreciated.

The table represents a linear function. what is the slope of the function? –6 –4 4 6

What is the value of the expression below? 148+(-6)| + |– 35= 7|

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