Determine whether the set of paired values in the table represents a proportional relationship. x-value 2 5 7 9 y-value 4 10 21 18 Select from the drop-down menu to correctly complete the statement. The relationship Choose... represent a proportional relationship.

Assume that there is a 11% rate of disk drive failure in a year. a. if all your computer data is stored on a hard disk drive with a copy stored on a second hard disk drive, what is the probability that during a year, you can avoid catastrophe with at least one working drive? b. if copies of all your computer data are stored on four independent hard disk drives, what is the probability that during a year, you can avoid catastrophe with at least one working drive?