A. Identify the relation that is not a function. weight of a person to a person's height
weight of an apple to the apple's cost
time of day to the temperature at that time
number of days to the height of a tree

B. Identify the relation that is a function.
last name to phone number
city name to state name
days of the week to the months of the year
number of apples purchased to the cost of the apples