Final answer:
To write and graph an inequality for a given solution set, use the appropriate inequality symbol and plot the corresponding graph on a number line.
Step-by-step explanation:
In Exercises 21-23, we are asked to write and graph an inequality for the given solution set.
For example, in Exercise 21, the solution set is x. To write the inequality, we use the symbol > to represent 'greater than'. So the inequality would be x > 3.
To graph this inequality, we plot an open circle at 3 on the number line and shade to the right to represent all values greater than 3.