Need help asap please

What is the average rate of change for this function for the interval from x=2 to x=4 ?

If 25% of y is 30, what is 60% of y?

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