The word sleep has one syllable.
One to one functions on a graph can vary. To determine if a function is one to one, a horizontal line can only intersect the function once. If it intersects the function more than once, it is not a one to one function.
Um . . . thats good, because when you sleep you grow (if you are a teenager or younger). You also need your sleep to function the next day.
a function is a one-to-one and many-to one relation
It is the function for which all the elements of the range of the function corresponds to exactly one element of the domain.