According to the given data we have the following:
The interval shown on the number line below is:
3 4 5 6 7 8
Hence, You will have to Use the inequality symbols for this question:
Therefore, as an inequality, it is 3 less than or equal to x less than or equal to 8
As far as using as set notation the interval shown on the number line would be as follow:
as set notation x = {3, 4, 5, 6, 7, 8}