Acorrelation indicates that two sets of scores tend to rise or fall together; for example, height and weight. a(n) correlation indicates that two sets of scores have an inverse relationship: as one goes up the other goes down; for example, time spent brushing teeth and decay.

positive; negative      

Explanation:

Positive correlation: It refers to a stable relationship between two different variables falling in the same direction, which means that if the value of one variable decreases the value of the other variable decreases as well and vice-versa. These are indicated by a positive sign.

Negative correlation: It indicates the inverse relationship between two different variables, which means that if one variable decreases the other variable increases, and vice versa. These are indicated by a negative sign.

you would times this by how many days there are in a year 365*400=$146000

d. i assume the underlined word is "role." reformat if it isn't.

explanation:

role is closest to part because when replacing words, "playing a vital decision," "playing a vital activity," and "playing a vital dollar" don't make logical sense. the only meaningful choice is "playing a vital part."

this fits one of merriam-webster's definitions of role: "a function or part performed especially in a particular operation or process."