Look at these sets of ordered pairs.
w) {(8, 9), (2, 3), (0, -2), (10, -9)}
x) {(0, 0), (5, 10), (-3, 3)}
y) {(1, 1), (2, 2), (3, 3), (4, 4)}
z) {(-10, 1), (-9, 3), (-4, 5)}
which of the sets represent functions?
a. w, x
b. x, y, z
c. w, z
d. w, x, y, z

It's D.

Step-by-step explanation:

There are no repetitions of the x values in the ordered pairs so they are all functions.

to determine the unit cost your would divide the total cost by the number sold.

7 bagels for $4.41       $4.41/7 = $.63 each at fresh side

5 bagels for $3.60         $3.60/5 = $.72 each at value mart

answer: (1,3) (3,-1) (5,-5) ?

step-by-step explanation: