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Band 7+: the given graph shows the nitrogen oxide emissions produced by foure vehicles

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The image presents nitrogen oxide emissions (g/km) against speed (kph) for diesel cars, petrol cars, lorries, and buses. Diesel cars start at 40 g/km at 10 kph, decreasing to about 8 g/km at 70 kph, then increasing steadily to 43 g/km at 130 kph. Petrol cars maintain relatively constant emissions from 5 g/km at 10 kph to around 8 g/km at 130 kph. Lorries start at 36 g/km at 10 kph, decline to a low of 16 g/km at about 70 kph, and rise to 33 g/km at 130 kph. Buses' emissions range from 11 g/km at 10 kph to 13 g/km at 130 kph, with a slight increase observed around 90 kph and above.

Given the complexity of the image, the above description may not be entirely accurate.

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Overall, a general trend can be observed in which nitrogen oxide emissions initially decreased as speed increased before rising again at higher speeds. Meanwhile, buses and lorries consistently produced far higher emissions than petrol and diesel cars. It is also noticeable that buses recorded the highest emission levels across all speed

At the start of the speed range, the figure for buses was about 40 g/km, compared with roughly 33 g/km for lorries. As speed increased, emissions from buses fell steadily, reaching approximately 27 g/km at around 60 kph. In contrast, lorries also showed a downward trend, declining to about 23 g/km at the same speed.

With regard to the other categories, petrol cars experienced relatively low emissions, moving from around 12 g/km to about 10 g/km before rising slightly at higher speeds. Conversely, diesel cars changed differently, as their emissions remained the lowest and relatively stable, fluctuating between 5 and 7 g/km. Overall, the data clearly compares emission levels across vehicle types and speeds.

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Overall Band Score

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Vocabulary Complexity:
C2 - Complex
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Grammar Mistakes: N/A

Vocabulary Repetition:

emissions: 5

buses: 4

speed: 3

higher: 3

speeds: 3

lorries: 3

about: 3

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Task Response

The report identifies some key trends and makes some comparisons, but there are inaccuracies and omissions that affect the clarity and accuracy of the description. The organization is present but could be improved for better flow. To improve, focus on accurately representing the data, ensuring correct values and trends are described. Also, enhance the structure by grouping information more logically and providing a clearer overview in the introduction and conclusion.

Coherence & Cohesion

The report is generally well-organized with a clear overall structure. The information is presented in a logical sequence, making it easy to follow the trends and comparisons. However, there are some opportunities to enhance the flow and connection between ideas. For instance, the transition between the overview and the detailed descriptions of each vehicle type could be smoother. Consider using more varied cohesive devices to link sentences and paragraphs, which would further improve the readability and coherence of the report.

Lexical Resource

The report demonstrates a good range of vocabulary suitable for describing trends and comparisons in the graph. Terms like 'initially decreased,' 'rising again,' 'consistently produced,' and 'downward trend' are used effectively. To further enhance the lexical resource, consider incorporating more specific and nuanced vocabulary related to emissions and vehicle performance. For example, instead of 'changed differently,' you could use more precise terms like 'exhibited a contrasting pattern' or 'followed an inverse trajectory.' Also, ensure that the vocabulary is consistently accurate and contextually appropriate throughout the report.

Grammatical Range & Accuracy

The report demonstrates a strong command of grammar with very few errors. The sentence structures are varied and appropriate for academic writing, and punctuation is generally accurate. To further refine the grammatical accuracy, pay attention to minor details such as subject-verb agreement and correct use of articles. While the report is already strong in this area, continuous attention to detail will help elevate the writing to an even higher level.

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