Answer:
The smaller unit rate is a better buy
Explanation:
Given
Larger unit rates and smaller unit rates
Required
Determine which is a better buy
To answer this, I'll use the following assumptions.
If store A and store B sell the same product at $2/ unit and $3/ per unit respectively.
At store A (with $2/unit), you will get 50 of that product at 50 * 2 = $100
At store B (with $3/unit), you will get 50 of that product at 50 * 2 = $150
Meaning that, you will spend more at the store with the larger unit rate (and you don't want that, do you?)
Hence, the smaller unit rate is a better buy.