Final answer:
Given the set of ordered pairs (13,8), (17,9), (11,19), each x value is unique and mapped to one y value, confirming that the set represents a function.
Step-by-step explanation:
The given set of ordered pairs is (13,8), (17,9), and (11,19). To identify the functions, we need to analyze the pattern between the x-values and the corresponding y-values. The student's question asks to identify functions from a set of ordered pairs. A function in mathematics is a relation where each input (x value) has a unique output (y value). The given set of ordered pairs is (13,8), (17,9), (11,19). To ascertain if these ordered pairs represent a function, we can look at the x values. Since all x values are unique, and each x value corresponds to exactly one y value, this set does indeed represent a function.