Ordered pairs in which of these formats would always represent a function, assuming that the cost of fruit stays the same? (number of oranges bought, total cost of groceries)
(number of apples bought, total cost of apples)
(number of apples bought, number of oranges bought)
(total cost of apples, total cost of groceries)

Number of apples bought, number of oranges bought.

Step-by-step explanation:

the circle graph is not a function.

step-by-step explanation:

the graph of the circle is not a function.

because for a graph to be a function, each value of x must give one value of y

in the circle, the values of x for -2< x< 2 each give 2 values of y.

hence this is not a function.