If x represents the number of months since the beginning of 2016 and y represents the total precipitation to date predict the amount of precipitation received between the end of march and the end of june

Given a circle with a radius of 2 which is the length of an arc measuring 75

How to do this , and can some one explain

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