← VCE Spreadsheets, SQL & Visualisation

Visualisation component: charts and graphs

A visualisation component that turns data into shapes such as bars, lines or slices so patterns can be seen quickly. Use one chart per message and place it near its explanation.

Part of: VCE Applied Computing - U1O1 - Data analysis — Module 81, VCE Data Analytics - U3O1 - Data Analytics — Module 119, VCE Data Analytics - U4O1 - Development and Evaluation — Module 67

Understanding Visualisation component: charts and graphs in VCE Spreadsheets, SQL & Visualisation

What it does: The numbers in the data become bars, and the different bar heights let the viewer spot the pattern at a glance. Each chart is given its own message, so the viewer is not confused by too many ideas in a single chart. A chart shows data as shapes so patterns stand out faster than in a list of numbers. Each chart should make one clear point. Cramming in several messages makes the chart hard to read. Placing a chart near its explanation helps the viewer link the shapes to their meaning. Bars, lines and slices let the eye compare values and see trends quickly.

Common mistakes: A pie chart shows parts of a whole, not change over time. To show sales rising each year, use a line chart: CHART: line, sales by year. A chart should sit near its explanation so the reader can link them. It should read PLACE: beside the explanation, not on a different page.

Class: _____________________  ·  Name: _____________________  ·  Date: _________

Free printable worksheet with full answer key — or add this module to a class and your students practise it interactively.

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This module's key terms are also in a printable crossword (Modules 71–86) and word search (Modules 55–86).

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Learning
Duo
Which is the main job of a chart in a visualisation?
Turn data into shapes such as bars, lines or slices so patterns can be seen quicklyReplace all the text so the audience has nothing to read
Matches
One chart showing sales, costs, staff ages, and weather
↓
Too many messages are crammed into one chart, so the pattern is hard to see. Split it into one chart per message.
Applying
Meanings
Term
chart
Meaning
A visualisation component that turns data into shapes such as bars, lines or slices so patterns can be seen quickly. Use one chart per message and place it near its explanation.
Practice
<figure>
Testing
Gaps
ADD TYPE "column" DATA data
Check Answer
Spots
1CHART: pie, sales by year
2MESSAGE: Sales rose each year

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Quick Questions

1. Which is the main job of a chart in a visualisation?
A. Replace all the text so the audience has nothing to read
B. Turn data into shapes such as bars, lines or slices so patterns can be seen quickly ✓
A chart shows data as shapes so patterns stand out faster than in a list of numbers.
2. A student wants to show how sales changed each month. Which choice follows the 'one chart per message' idea?
A. One line chart that shows monthly sales only ✓
B. One chart that mixes monthly sales, staff ages, canteen prices and rainfall
Each chart should make one clear point. Cramming in several messages makes the chart hard to read.
3. Where should a chart be placed in an infographic?
A. Next to the text that explains it ✓
B. On the opposite side of the page from its explanation
Placing a chart near its explanation helps the viewer link the shapes to their meaning.
4. True or false: A chart helps viewers spot patterns faster than a long list of numbers.
A. False
B. True ✓
Bars, lines and slices let the eye compare values and see trends quickly.
5. A visualisation has three separate messages: attendance by year level, canteen sales by day and the trend in lost property. What is the best approach?
A. Use three charts, one for each message ✓
B. Squeeze all three messages into a single chart
One chart per message keeps each chart simple, so the audience can understand it at a glance.

Match the Pairs

Chart: monthly sales by store → One chart carries one message, so the title states the single point the chart makes
Chart + caption beside it → A chart placed near its explanation so the viewer reads the shapes and the text together
A chart turns data into shapes such as bars, lines or slices so patterns can be seen quickly → Bars: Mon=12, Tue=18, Wed=25
Use one chart per message instead of cramming several messages into one chart → Chart 1: Sales up | Chart 2: Costs down
One chart showing sales, costs, staff ages, and weather → Too many messages are crammed into one chart, so the pattern is hard to see. Split it into one chart per message.
Chart at the top of the page, its explanation at the bottom → The chart is far from its explanation. Place the chart near the text that explains it.

Key Term

chart
A visualisation component that turns data into shapes such as bars, lines or slices so patterns can be seen quickly. Use one chart per message and place it near its explanation.

Fill in the Blanks

1. SET data TO SalesByTerm ADD chart TYPE "column" DATA data
Hint: Type the visualisation component that turns data into shapes such as bars, lines or slices.
2. SET purpose TO "change over time" ADD chart TYPE "line" DATA Months
Hint: Type the chart type that best shows change over time.
3. SET caption1 TO "Sales rose in term 2" PLACE chart1 NEAR caption1
Hint: Type the variable holding the explanation that the chart should be placed next to.
4. SET messages TO 3 SET charts TO messages
Hint: Type the variable that sets the number of charts, using one chart per message.
5. SET purpose TO "compare categories" ADD chart TYPE "column" DATA Scores
Hint: Type the chart type that compares values across categories.

Spot the Error

Question 1
A CHART: pie, sales by year
B MESSAGE: Sales rose each year
C PLACE: beside the TEXT
D TEXT: Sales rose 20% in 2024
Line A — A pie chart shows parts of a whole, not change over time. To show sales rising each year, use a line chart: CHART: line, sales by year.
Question 2
A MESSAGE: Pets owned by type
B CHART: bar, pets by type
C PLACE: on a different page
D TEXT: Dogs are most common
Line C — A chart should sit near its explanation so the reader can link them. It should read PLACE: beside the explanation, not on a different page.
Question 3
A MESSAGE: Pizza is top seller
B CHART: pie, share of sales
C TEXT: Pizza is 40% of sales
D PLACE: far from the TEXT
Line D — Placing the chart far from its text makes the reader hunt for the link. The chart should be placed beside the TEXT.
Question 4
A MESSAGE: Rain peaks in June
B CHART: column, rain by month
C CHARTS: 5 for this message
D TEXT: June was the wettest
Line C — Use one chart per message. Five charts for one message clutters the visualisation. It should be CHARTS: 1 for this message.
Question 5
A MESSAGE: Height vs shoe size
B TEXT: Taller means bigger feet
C PLACE: beside the TEXT
D CHART: pie, height, shoe
Line D — A pie chart cannot show how two measurements relate. A scatter graph is the right chart for height against shoe size.

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