Question
The graph shows the cost of T-shirts at a local store.
A sign in the store window advertises 3 t-shirts for $16.50. Which coordinate pair shows the unit rate for the t-shirt sale?
Responses
A (0, 0)(0, 0)
B (1, 5.5)(1, 5.5)
C (2, 11)(2, 11)
D (3, 16.5)(3, 16.5)
The unit rate is the cost per t-shirt. Since the sign advertises 3 t-shirts for $16.50, the unit rate is $16.50/3 t-shirts = $5.50/t-shirt.
The correct coordinate pair that shows the unit rate for the t-shirt sale is B: (1, 5.5).