Which of these is an example of a recurring-payment variable annuity

25 years

Step-by-step explanation:

Your annuity is $300,000 at age 60, the insurance company offers you to pay $1,000 per month.

$300,000/$1,000 = $300 monthly

$300 months/12 = 25 years to recover investment

You will have to live until age 85 to break even

yes because there is exactly one y value for every x value

for function there can't be more than one value for every x value