Which equation describes a relationship such that x = 0 must be excluded from the domain? y = 2 x
y = 2 + x
y = 2/x
y = x ^2

y = 2/x

Step-by-step explanation:

You cannot divide by zero because you will get an undefined value, and this will create a hole in the graph.

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