David Gwyn J. answered 10/20/20
Highly Experienced Tutor (Oxbridge graduate and former tech CEO)
Clearance items P (price) "at least" 3 and P "no more than" 8
Hence inequality is 3 <= P <= 8
The best graph for an inequality like this is a "number line".
Label the line P for Price ($)... and add some numbers from 0 to 10, say...
a small circle around 3 to show end point, and circle around 8 to show end point... both circles filled in to show that we include the 3 and the 8. And draw a line joining them.