Does this table show a proportional relationship? If so, what is the constant of proportionality? x3 6 9 12
y12 24 45 60

A. Yes; 14 is the constant of proportionality.

B. Yes; 4 is the constant of proportionality.

C. Yes; 5 is the constant of proportionality.

D. No; the quantities are not proportional.​

1. according to the internal revenue service, the mean tax refund for the year 2007 was $2,708. assume the standard deviation is $650 and that the amounts refunded follow a normal probability distribution. a. what percent of the refunds are more than $3,000? b. what percent of the refunds are more than $3,000 but less than $4,000? c. what percent of the refunds are less than $2,000?