1.This graph shows the height of a football above the ground from the time the ball was snapped for a field goal attempt.

Over which time period did these events occur?                         (a) the holder received the snap                                                 (b) the ball was increasing in height                                             (c) the ball was kicked                                                               (d) the ball landed in the stands behind the goal posts

Notice that there are no breaks in the curve because it is possible to have a fractional units of both time and height.

2. This graph shows one team's  score during the course of a  football game.

Give the letter that corresponds to the time these events occurred                                                                                  (a) the team scored a touchdown (worth 6 points)                      (b) the team kicked the extra point                                             (c) the team kicked a field goal (worth 3 points)                          (d) the team scored its first points

Notice that there are breaks in this curve because the team's score only took on values of 0, 3, 9, and 10.

3. Complete the following graph to show the price a fan would have to pay to purchase tickets for a football game. Each ticket costs $10.00. The dots on the graph should not be connected because it is impossible to buy a fractional number of tickets or to pay a fractional value for those tickets.

Choose the graph that best represents the information given. Write LEFT, MIDDLE, or RIGHT

A call to London, England costs $1.78 for the first  minute and $1.00 for each additional minute. Fractions of a minute are charged as an entire minute.

5. The length of a banana changes from the time you begin to eat it.

6. The fare charged to rail commuters changes as the distance between the suburban stations and the city terminal increases.

8. A woman's shoe size depends on the length of her foot in inches.

9. A speeding car hits a tree.

10. The number of hours of light depends on the time of year.

11. A company charges $9.95  for each custom-printed T-shirt. If you order 8 or more but less than 15, the charge is $8.25 each. If you order 15 or more, the charge is $6.50 each.

Sketch a graph representing each situation. Use a scale only when you think it is necessary.

12. The hight of a maple tree changes from the time it was planted as a sapling.

13. The height of a person changes with the age of that person

14. The loudness of a tape changes as the distance  from your ear to a stereo speaker increases.

15. The path traced by W in the problem 7 if W is the center of the circle.

16. The amount of money in your bank account if you make no withdrawals and interest is compounded daily.

17. The speed of a skier changes as she goes up the mountain on a  lift, waits her turn, and skies down the mountain.

18. Your score on a test  changes as the time you study for it increases.

19. Your level of energy on a Friday changes from the time you get up to the time you go to bed.

20. The amount of gas in your gas tank during the following sequence: the tank is filled, the car is driven at 55 mph for 3 hours, it is parked for 3 hours; the car is driven at 20 mph for 2 hours, the tank is refilled.

21. In an article published in the March 10, 1984 issue of Science News, Harry Bahrick, a psychologist, reported that all students who take a foreign language in high school begin to forget that language if they do not use it regularly. However, after 6 years, these students.