Question

Describe four different types of intervals that can exist on a number line.

Answer 1

positive, negative,0

Answer 2

The four different types of intervals that can exist on a number line are

1.→[a,b]-----Closed Interval

2.→(a,b)----Open Interval

3.→[a,b)----Semi Open Interval or Half closed or half open Interval

4.→(a,b]----Semi Open Interval or Half closed or half open Interval