2013年悉尼与墨尔本之间的机票价格

The response covers both routes and gives several accurate figures, but its overview focuses on week 2 and its details are uneven. The Friday-peak claim overlooks the first Sydney-to-Melbourne Monday, while several unchanged fares are not quantified. The Monday-only change is valid as a comparison between weeks, although its wording is unclear.

The response moves from an introduction and Sydney-to-Melbourne details to the reverse route, then ends with a week 2 summary. This route-based sequence is understandable, but unclear references and a long final sentence weaken the progression.

Vocabulary is adequate for describing prices and trends, with some variety such as fluctuate, declines, and stagnant, but imprecise usage like rise to $80 and higher more than reduces accuracy.

The response attempts both simple and complex sentences, but agreement, tense and clause-linking errors recur. Examples include switching from plural prices to it, using are with the singular subject the price, and the double comparative higher more than. Meaning usually remains recoverable.

The response covers both routes and reports most key figures accurately. The statement that Tuesday-to-Sunday fares showed no discrepancy is valid as a week-to-week comparison, though it could be clearer. The overview could identify the midweek lows more precisely, and the Monday exception to the Friday peak should be limited to week 1.

Ideas are logically organised with clear paragraphing and a range of cohesive devices used naturally, with only occasional slight mechanical linking such as the loosely connected sentence about Friday prices.

Vocabulary is varied enough to describe the changes clearly, including sharp drop, sharp decrease and remained stable. Some expressions are less natural or precise, particularly mildly similar pattern and the repeated personification of prices as witnessing or recording changes.

A range of complex structures, including relative clauses, participial phrases, and apposition, is used with good control, and errors are minor and non-impeding, such as Mondays and Saturdays' ticket prices.

The response covers both routes and gives many accurate figures, but the overview needs a clearer account of the weekly changes. It assigns a $75 Friday fare to the weekend, omits the return-route Friday decrease and incorrectly presents Saturday fares as stable.

The sequence from introduction and overview to each route is logical. References such as “This” and “between the bar graphs” could identify the intended fare or time comparison more explicitly.

Vocabulary is sufficiently flexible for describing price trends, but some selections such as 'discrepancies', 'distinctively different', and 'flight-goers' are imprecise.

A good range of structures, including participle clauses and comparative forms, is used with flexibility, despite occasional awkward constructions such as 'a week later showed a $20 decrease'.

The response covers both routes, both weeks and the main fare patterns with an appropriate overview. Two reporting errors reduce precision: Sydney-to-Melbourne Thursday fares were $40, not under $40, and the reverse-route reductions affected Friday rather than Sunday. The remaining selected figures are generally accurate.

Ideas progress logically from an overview to detailed descriptions of each direction, with cohesive devices like 'Overall' and 'The trend was similar' used effectively, though some referencing of weeks and price movements is occasionally loose.

Vocabulary is sufficiently flexible and precise for the task, using terms like 'airfares', 'notable exception', and 'significantly reduced', with only minor mechanical slips in currency formatting.

Sentence structures are varied and largely accurate, including extended comparisons and contrastive clauses. There is a slight tense shift in displayed patterns that are similar, but control is generally good. The long final paragraph would read more smoothly with less reliance on parenthetical week labels.