If a set of ordered pairs is a function, are the ordered pairs also a relation? (Also, please explain why)

Your text or notes should have definitions for a relation and a function

In simple terms, a relation is any equation that contains two different variables, usually x's and y's
e.g. x + y = 8 is a relation
again, in simple terms, if I can isolate the y so it is represented by one expression containing only x's and constants, then it is a function
There are probably fancier definitions found in your text, but the above makes sense.

Linda has a part-time job at the school. She makes between $45.00 and $52.00 a day. Which is a reasonable estimate of the amount of money that Linda makes for working 6 days?

Yes, if a set of ordered pairs is a function, then it is also a relation.

To understand why, it's important to know the definitions of these terms.

A relation is a set of ordered pairs, where the first element of each pair is called the input or domain, and the second element is called the output or range. In other words, a relation is simply a collection of pairs connecting inputs to their corresponding outputs.

Now, a function is a special type of relation where each input is uniquely associated with exactly one output. In other words, for every input, there is only one corresponding output in a function.

Since a function is a relation that follows this unique mapping rule, it is a more specific type of relation. Therefore, any set of ordered pairs that forms a function must also satisfy the criteria of a relation, as it is a collection of pairs connecting inputs to their corresponding outputs.