Algebra 1A
Algebra 1 Name: _____________________________
Worksheet Gr2 Period: _____ Seat: _____
Problems 1-4:
Ms Moneysworth is making some stew. She puts all the ingredients in a large pot and turns on the stove to boil it. A graph of the temperature of the stew over time is as follows:
1. What was the temperature of the stew when she first put it on the stove?
2. How long did it take until the stew started to boil?
3. How long did she leave the stove burner on?
4. How long was the stew boiling?
Problems 5-8: (Adopted from Dr. Doug Shaw)
Match the stories with the graphs, where x = time and y = temperature. When finished, write a similar story that would correspond to the final graph.
5. I took my chicken out of the freezer at noon, and left it on the counter to thaw. Then I cooked it in the oven when I got home at 4.
6. I took my chicken out of the freezer in the morning, and left it on the counter to thaw. Then I cooked it in the oven when I got home at 4.
7. I took my chicken out of the freezer in the morning, and left it on the counter to thaw. I forgot about it, and went out for Chinese food on my way home from work. I put it in the refrigerator when I finally got home.
8. (Your story for the remaining graph):
Problems 9-14:
Sally sells seashells by the seashore. On different days she charged different prices and kept track of the number seashells she sold. The following is a graph of the data she collected:
9. When Sally charged 65 cents, how many did she sell?
10. Draw the line of best fit for this data.
11. What is the y-intercept of the line of best fit?
12. What is the meaning of the y-value of the y-intercept?
13. What is the x-intercept of the line of best fit?
14. What is the meaning of the x-value of the x-intercept?
Problems 15-20:
The following graph shows the closing Dow-Jones averages on the third of each month from October 3, 1980 to October 31, 2008:
15. For about how many years was the closing average 4000 or below?
16. Approximately what was the highest closing average?
17. Approximately what was the closing average on October 3 of 2008?
18. Approximately what was the lowest closing average since the year 2000?
19. When did the closing average fall the most, from September 3 to October 3?
20. Use a line of best fit to predict what the closing average might be on October 3, 2010.
21. You put some ice cubes in a glass, fill the glass with water, and then let the glass sit on a table. Which of the following graphs most resembles the relation of the temperature of the water (y) and the elapsed time (x)?
22. Sketch a rough graph of the temperature outside (y) as a function of hours after midnight (x):
Problems 23-24:
The graph shown gives the weight (y) of a certain person as a function of age in years (x):
23. Describe in words how this person’s weight varied over time.
24. What might have happened when this person was 30 years old?
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Graph C
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Graph 1
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