Ajogger travels 2,000 m in 12 min. what is the joggers average speed in km/h

Pls! does anybody know a shortcut for answering these types of questions in the future?

Organic apples are on special for $1.50 per pound. does total cost vary inversely or directly with the number of pounds purchased? find the cost of 3.4 pounds of apples. a. inversely: $5.10 b. directly; $5.10 c. inversely: $2.27 d. directly; $2.27

What is the value of f(x) = 2.2 for f(-2)?