2
QuizMultiple Choice

Finding a Constant of Proportionality

Question 2 • Pre-Algebra A-CR

The table below shows the price of rolls at a bakery. A baker’s dozen includes 13 rolls for the price of a dozen rolls. How much money is saved by buying a baker’s dozen instead of 13 individual rolls?Number of rolls68Baker’s dozenPrice ($)$3.60$4.80$7.20

Answer
A
$0.55
B
$0.60
C
$0.70
D
$0.75

Explanation

The table shows that 6 rolls cost $3.60, so each roll costs $3.60 ÷ 6 = $0.60. Buying 13 individual rolls would cost 13 × $0.60 = $7.80, while a baker’s dozen costs $7.20. The savings are $7.80 − $7.20 = $0.60, so the answer is B, $0.60.

AI-written and checked against the verified answer.

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