IELTS writing task 1: Water usage in San Diego, California and the rest of the world.

Question

The graphs provide a water usage comparison between San Diego, California and the world. Overall, we can clearly see that the amount of water consumed by residents in SanDiego correlated negatively with the worldwide’s number. On the other hand, California shows an evenly distributed proportion among the three sectors.

Figuratively, domestic water usage in San Diego is the highest among the three, with exactly 60% of the water being used for that sole purpose. In contrast, the sector that requires the least amount of water in the world is residential, with only 8%, whereas agriculture takes up most of the pie chart with 69%. It is also noticeable that San Diego has the exact percentage of water used for industry as the world, which is 23%.

Contradicting with the drastic differences in proportions of water usage in San Diego and the world, California has a more evenly distributed graph with 28% and 33% of water being used for agriculture and industry respectively. Residential water usage in California also take the largest part of the pie chart like San Diego but at a much lower number, 39%. (185)

AlpheccaStars · Accepted Answer

The graphs (What kind of graphs?) provide a water usage comparison between California, San Diego County, ~~California~~ and the world. (You did not finish describing the graphic. How many sectors are shown?) Overall, we can clearly see that the amount of water consumed by residents in SanDiego correlated (Correlation makes no sense with pie charts. Correlation is used to measure the degree that two different variables move in the same (or opposite) directions. See the example below.) negatively with the worldwide’s (wrong form) number. On the other hand, California shows an evenly distributed proportion among the three sectors. (You should have made two paragraphs, not one. 1 - introduction, 2 - overall observations.)

Figuratively, (wrong word) domestic water usage in San Diego County is the highest among the three, with exactly 60% of the water being used for that sole purpose. In contrast, the sector that consumes ~~requires~~ the least amount of water in the world is domestic ~~residential~~, (When you compare two quantities of one category, use the same words. Don't use synonyms. It confuses the reader.) with only 8%, whereas agriculture takes up most of the pie chart with 69%. It is also noticeable that San Diego has the exact percentage of water used for industry as the world, which is 23%.

Contradicting (wrong word.) with the drastic differences in proportions of water usage in San Diego and the world, California has a more evenly distributed graph with 28% and 33% of water being used for agriculture and industry respectively. Residential water usage in California also take the largest part of the pie chart like San Diego but at a much lower number, 39%. (185)

Correlation:

Correlation measures the degree that two quantities go up or down together.

For example, you have a research topic with the question:

Do high-income families use more water than low-income families?
Is there a correlation between water usage and family income?

To answer this question, you do some research.
You ask a lot of families how much income they have and how much water they use each month.
You write down the information in a table.

For example,
Family "E" earns $2000 and uses 20 units of water.
Family "D" earns $2800 and uses 23 units of water.
Family "K" earns $5300 and uses 29 units of water.
Family "L" earns $5800 and uses 46 units of water.

After you have the data from a lot of families, you make a graph of the data. One axis has the water usage, and the other has the income. Each family has one mark on the graph. Then you see if there is a relationship. In this case the green line is drawn after all the marks are on the graph. It shows the positive correlation - as income goes up, water usage also goes up. This is called positive correlation between the two variables: water usage and monthly income. You put this data and the graph in your research report.

IELTS writing task 1: Water usage in San Diego, California and the rest of the world.

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