Which statement best explains why this graph represents a function

When only separate discreet points are graphed it is called?

Afrequency table of grades has five classes (a, b, c, d, f) with frequencies of 3, 13, 14, 5, and 3 respectively. using percentages, what are the relative frequencies of the five classes?

Kayaks rent for $35 per day. which expression can you use to find the cost in dollars of renting 3 kayaks for a day?