Unit price would be the price per ounce.
Divide the total cost by the number of ounces:
Price Club : 2.59 / 12 = $0.216 per ounce
Shop Mart: 1-1/2 pounds = 1.5 x 16 = 24 ounces.
4.68 / 24 = $0.195 per ounce.
Shirley/Tracey has to stay at least 10 days for the M and N to cost less
I’m pretty sure the slope is -1/2
The domain is the set of all real numbers.
The range is the set of all real numbers.