Math question need help

 It is a function because every input has exactly one output. The domains are -5,5,3,-4  and the ranges are 4,-4,1,-8 .

Step-by-step explanation:

Domain is all the input values or the x values.

The range is all the output values or the y values

Domain      Range

 -5                  4

  5                 -4

  3                  1

  -4                 -8

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

the correct answer is $7.38

step-by-step explanation: