ENTERING INTERVAL ANSWERS For intervals of values, enter your answer using interval notation. Here are some examples of how interval notation relates to inequalities: I Inequality Interval Notation | 3 3 (3, 00) |3 to exclude the endpoint of the interval. With interval notation, we use use round parentheses, ( or }. With inequalities, we use "less than or equal to": s or "greater than or equal to": z to include the endpoint of the interval. With interval notation, we use use square brackets, [or ]. To combine two intervals, use U [an uppercase letter u} for union: U Use 00 {two lowercase letter o's} for infinity: 00 For example, to enter [ 00, 2] U [3, 6], you would type: (oo,2]U(3,] Tm:r it now. Enter the interval equivalent to 2 7 :l