· y = log, (x - 1)-3 A) Domain: All reals
Range: x< 1
B) Domain: x>-1
Range: All reals
C) Domain: x > 1
Range: All reals
D) Domain: x< 1
Range: All reals

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

take the logarithm of both sides (the base of the log doesn't matter):

apply the exponent property - this says that :

distribute the log terms on both sides:

group like terms together:

divide through both sides by the coefficient on :

you can do some additional rewriting here using the properties of the logarithm to simplify things if you like: