Rachel likes to read books. she records the number of books she read over a period of 5 weeks. the set of ordered pairs below gives the details, where the x-coordinate is the number of weeks since she starts recording and the y-coordinate is the number of books she read each week. (1,2), (2,3), (3,1), (4,4), (5,2) which of the following describes the set of ordered pairs? a. both a relation and a function b. a function only c. neither a function nor a relation d. a relation only