For each graph below, determine the following:

1. The domain
2. The range
3. The interval(s) on which the function is increasing
4. The interval(s) on which the function is decreasing
5. The interval(s) on which the function is constant

a) f(x)=abs(x+1)

b) f(x)=-sqrt(x)-1

c)f(x)=2x+1, f(x)=7