← ACARA Digital Technologies Years 7–8

Describing a trend in a sentence with evidence

A trend statement says what changed, which way it went and the numbers that show it, plus a limit or reason such as 'because' or 'might'.

Part of: ACARA Digital Technologies Years 7–8 — Analysing and Visualising Data — Module 52, ACARA Digital Technologies Years 9–10 — Analysing and Visualising Data — Module 72

Understanding Describing a trend in a sentence with evidence in ACARA Digital Technologies Years 7–8

What it does: The word 'because' links the prediction to evidence from the data, and 'might' shows it is not certain. The numbers 40 and 65 show how much the data changed over time, which makes the statement clear and checkable. The Week 4 value of 20 does not fit the pattern. A good trend statement points out the outlier and gives its number. The first sentence names a direction but gives no numbers. Adding 'from 19 to 31' gives evidence that others can check.

Common mistakes: The numbers go up from 40 to 65, so the direction word must be 'rose', not 'fell'. It should read: Sales rose from 40 to 65. The numbers in a trend statement must match the data. The last value is 65, not 55. It should read: Sales rose from 40 to 65.

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This module's key terms are also in a printable crossword (Modules 331–360) and word search (Modules 331–411).

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Learning

Duo

Which sentence is a clear trend statement about canteen sales?

Sales went up a lot and it looks good.Sales rose from 40 to 65 pies between Week 1 and Week 5.

Matches

Sales went up a lot.

↓

No numbers as evidence and no start or end values. Fix: 'Sales rose from 40 to 65.'

Applying

Meanings

Term

Sales rose from 40 to 65

Meaning

A trend statement says what changed, which way it went and the numbers that show it, plus a limit or reason such as 'because' or 'might'.

Practice

Sales rose from 40 to 65 between Monday and Friday.

Testing

Gaps

Sales from 40 to 65 over six weeks.

Check Answer

Spots

1Sales fell from 40 to 65.

2Week 4 (20) was an outlier.

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Quick Questions

1. Which sentence is a clear trend statement about canteen sales?

A. Sales rose from 40 to 65 pies between Week 1 and Week 5. ✓

B. Sales went up a lot and it looks good.

A clear trend names what changed, the direction and the actual numbers. 'A lot' is vague and gives no evidence.

2. Which sentence starter shows the direction AND the numbers?

A. Sales are shown in the chart.

B. Sales rose from 40 to 65. ✓

'Sales rose from ... to ...' gives the direction (rose) and the evidence (the two numbers). Saying the chart shows sales tells us nothing about the trend.

3. A line chart shows sales of 40, 45, 50, 20, 60, 65. Which sentence mentions the outlier well?

A. Sales rose from 40 to 65, except in Week 4 when they dropped to 20. ✓

B. Sales rose from 40 to 65 and nothing odd happened.

The Week 4 value of 20 does not fit the pattern. A good trend statement points out the outlier and gives its number.

4. Which sentence adds a prediction the correct way?

A. Sales might reach 80 next week because they have risen every week. ✓

B. Sales will definitely reach 80 next week.

A prediction is not certain, so use 'might'. Adding 'because' gives the reason from the data. 'Definitely' claims more than the data can prove.

5. Which sentence is missing a number as evidence?

A. Temperatures climbed from 19 to 31 over the week.

B. Temperatures climbed steadily over the week. ✓

The first sentence names a direction but gives no numbers. Adding 'from 19 to 31' gives evidence that others can check.

Match the Pairs

Sales rose from 40 to 65 → Names what changed, the direction (rose) and the numbers that show it

Sales rose, except for the outlier in May → Mentions an outlier so the trend statement is honest about a point that does not fit

A prediction should give a reason using 'because' → Sales might reach 80 next month because they rose each month

A trend statement uses the start and end numbers as evidence → Sales rose from 40 in Jan to 65 in June

Sales went up a lot. → No numbers as evidence and no start or end values. Fix: 'Sales rose from 40 to 65.'

Sales will reach 80 next month. → Sounds certain and gives no reason. Fix: 'Sales might reach 80 next month because they keep rising.'

Key Term

Sales rose from 40 to 65

A trend statement says what changed, which way it went and the numbers that show it, plus a limit or reason such as 'because' or 'might'.

Fill in the Blanks

1. Sales rose from 40 to 65 over six weeks.

Hint: Type the verb that tells the reader which direction the sales went (up).

2. Sales rose from 40 to 65 over six weeks.

Hint: Type the sentence starter word that introduces the starting number.

3. Sales rose, but week 4 (20) was an outlier.

Hint: Type the word for a value that does not fit the pattern of the other data.

4. Sales rose from 40 to 65 in 6 weeks. Next week they might reach 70.

Hint: Type the cautious word that shows a prediction is possible but not certain.

5. Sales fell from 65 to 50 because it rained.

Hint: Type the linking word that introduces the reason for the change.

Spot the Error

Question 1

A Sales fell from 40 to 65.

B Week 4 (20) was an outlier.

C It might keep rising because

D more students buy lunch.

Line A — The numbers go up from 40 to 65, so the direction word must be 'rose', not 'fell'. It should read: Sales rose from 40 to 65.

Question 2

A Data: Jan 40, Feb 50, Mar 65

B Sales rose from 40 to 55.

C The rise is 25 sales.

Line B — The numbers in a trend statement must match the data. The last value is 65, not 55. It should read: Sales rose from 40 to 65.

Question 3

A Rain fell from 14 mm to 6 mm.

B Week 3 was an outlier: 30 mm.

C It will fall more because

D the dry season is starting.

Line C — A prediction from a trend is not certain, so it should use a limit word such as 'might'. It should read: It might fall more because.

Question 4

A Steps rose from 3000 to 5000.

B That is an increase of 8000.

C One day was an outlier: 9000.

Line B — The increase is 5000 - 3000 = 2000, not 8000. The evidence numbers must be calculated correctly.

Question 5

A Visits rose a lot last week.

B Day 5 was an outlier: 300.

C It might rise because of the

D school fair next week.

Line A — A clear trend statement needs the numbers that show the change. 'A lot' is vague. It should read: Visits rose from 120 to 180.

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