Unit price for smaller bottle = 2.19 / 13.5 = $0.16 per ounce
For larger bottle its 5.37 / 29.2 = $0.18 per ounce
( to the nearest cent).
The better buy is the 13.5 ounce bottle
Your answer to look for is: Slope ( -5/3 ) & Y-intercept ( 7/3 )
Remember: Radius is half of the diameter and Diameter is radius times 2. Diameter should have a line all through the Circle and the Radius look like a line that is cut short.
