Trend Detectives Practice Test Worksheets
Build confidence with printable data-interpretation worksheets and focused practice tests. Students learn to recognise rising, falling, and unchanged values, match graphs to tables, and translate written trends into visual patterns while improving their accuracy with multi-step reasoning.
For students who can read individual values, but need practice following patterns across several intervals.
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What Do Trend Detective Questions Look Like?
Trend Detective questions test how well you follow patterns in charts, graphs, and tables across consecutive intervals. The challenge is identifying whether values rise, fall, or remain constant over time, and translating between visual graphs and tabular data. Here is a worked example.
Match a Table to a Line Graph
Question: Which line graph shows the same sequence of rises, falls, and unchanged values as Amber River's table?
| Period | 1 | 2 | 3 | 4 | 5 | 6 |
|---|---|---|---|---|---|---|
| Value | 35 | 25 | 25 | 25 | 35 | 35 |
Worked Method
Step 1: 35 to 25 goes down.
Step 2: 25 to 25 stays flat, and the next 25 to 25 also stays flat.
Step 3: 25 to 35 goes up, then 35 to 35 stays flat.
Answer: Graph C.
Tip: Repeated values create flat sections. Six values give five transitions to check.
Rules to Help You Solve Trend Detective Questions
The source papers use line graphs, bar charts, tables, and short stories. Use these core rules to track transitions from one interval to the next systematically:
↑ Rule 1: Read each transition
Compare neighbouring values one pair at a time. Record whether the value goes up, down, or stays flat.
Example: 35, 25, 25, 35 becomes down, flat, up.
↔ Rule 2: Match direction, not height
These questions ask you to match qualitative trends: the direction of each step. Different numbers can give the same trend. When a question asks for the same numerical data, the plotted values must also match.
Example: 10, 16, 20 and 30, 35, 45 both show up, up.
≡ Rule 3: Flat means unchanged
A horizontal line or repeated value is a real part of the pattern. Do not skip it when comparing options.
Example: 450, 450, 400 begins flat, down, not down.
⇄ Rule 4: Check both lines separately
For a two-line graph, write the sequence for the solid line and the dashed line before testing the tables.
Example: Match down, up, up and flat, up, up independently.
Two More Worked Examples
Translate a Story into a Graph Pattern
Question: A score grew, then went down, rose again, declined, and finally remained constant. Which sequence matches the story?
Worked Method
Step 1: Convert each phrase in order: grew = up, went down = down, rose = up.
Step 2: Declined = down. Remained constant = flat.
Answer: Graph E.
Tip: Translate every phrase before inspecting the options.
Find One Incorrect Transition
Question: The graph should follow the same trend directions as the table of Abigail's scores. In which interval does its direction first fail to match?
| Source | R1 | R2 | R3 | R4 | R5 | R6 |
|---|---|---|---|---|---|---|
| Table | 450 | 450 | 400 | 400 | 400 | 450 |
| Graph values | 450 | 500 | 350 | 350 | 350 | 500 |
Worked Method
Step 1: Compare each pair of neighbouring table values: flat, down, flat, flat, up.
Step 2: Read the graph from R1 to R6: up, down, flat, flat, up.
Step 3: Only the first transition differs. From R1 to R2, the table stays at 450, but the graph rises from 450 to 500. All four remaining directions match.
Answer: The mismatch is R1-R2.
Tip: This question asks about trend directions. Different values can share a direction pattern; they would not count as an accurate plot of the same numerical data.
