Answer: The constant of proportionality for the sales is 1/5. Therefore, option D is the correct answer.
Step-by-step explanation:Proportional relationships are relationships between two variables where their ratios are equivalent. Another way to think about them is that, in a proportional relationship, one variable is always a constant value times the other. That constant is known as the "constant of proportionality".The given table shows the amount of money raised and the number of tickets sold by each of four students.The constant of proportionality for the sales isFawn: 15/85 =1/5Ryan: 13/65 =1/5Daisy: 9/45 =1/5Doug: 6/30 =1/5Therefore, option D is the correct answer.