3n at n=11
me im suck at maths

How do you determine whether a relationship represented as as graph is linear or nonlinear

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

A50% increase followed by 33 1/2% decrease