Practice Making Line Graphs

Review your notes on line graphs. (Notes)

Problem # 1:

The relative hormone levels vary greatly during the 28-day human menstrual cycle. The table below shows the relative levels of the four major hormones by day.

 Day Luteinizing Hormone (LH) Follicle Stimulating Hormone (FSH) Estrogen Progesterone 1 6 10 10 2 2 7 11 10 2 3 8 12 10 2 4 8 13 10 2 5 8 14 10 2 6 8 13 13 2 7 8 12 16 2 8 8 12 19 2 9 8 12 22 2 10 10 13 28 2 11 12 14 35 2 12 22 16 28 3 13 32 20 22 4 14 20 15 19 5 15 6 10 16 8 16 6 9 15 10 17 6 8 15 12 18 6 8 15 15 19 6 8 15 18 20 6 7 15 24 21 6 6 15 28 22 6 6 15 28 23 6 6 15 28 24 5 6 13 24 25 4 6 10 18 26 3 8 10 12 27 3 10 10 7 28 3 10 10 2
1. Estrogen levels are highest on day number?
2. LH levels are highest on day number?
3. This data is very accurately measured. Plot the data points and then draw a line graph in "connect-the-dot" fashion.

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Problem # 2:

 Amount of ethylene in ml/m2 Wine sap Apples: Days to Maturity Golden Apples: Days to Maturity Gala Apples: Days to Maturity 10 14 14 15 15 12 12 13 20 11 9 10 25 10 7 9 30 8 7 8 35 8 7 7
1. Ethylene is a plant hormone that causes fruit to mature. The data above concerns the amount of time it takes for fruit to mature from the time of the first application of ethylene by spraying a field of trees.
2. Make a line graph of the data.
3. What is the dependent variable?
4. What is the independent variable?

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Problem # 3:

 Age of the tree in years Average thickness of the annual rings in cm. Forest A Average thickness of the annual rings in cm. Forest B 10 2.0 2.2 20 2.2 2.5 30 3.5 3.6 35 3.0 3.8 50 4.5 4.0 60 4.3 4.5
1. The thickness of the annual rings indicate what type of environmental situation was occurring at the time of its development. A thin ring, usually indicates a rough period of development. Lack of water, forest fires, or a major insect infestation. On the other hand, a thick ring indicates just the opposite.
2. Make a line graph of the data.
3. What is the dependent variable?
4. What is the independent variable?
5. What was the average thickness of the annual rings of 40 year old trees in Forest A?
6. Based on this data, what can you conclude about Forest A and Forest B?

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