RobotnixAcademy

Week 02 · lesson

Lesson 5: Turn Data Into a Chart Claim

A chart is not automatically evidence.

A chart becomes evidence when you can explain the data, the rule used to create the chart, and the claim the chart supports.

Today you will create one chart from your Week 2 spreadsheet and add the result to your portfolio evidence.

Select the right data

Before inserting a chart, ask:

What question am I trying to answer?

Possible questions:

  • How many artifacts are in each category?
  • How many artifacts are ready for review?
  • Which artifacts have the most revisions?
  • What percent of the portfolio is website, media, presentation, or data work?

The chart type should match the question.

A bar chart can compare categories. A pie chart can show parts of a whole, but only when the categories actually add up to one whole. A line chart usually shows change over time.

Chart labels matter

A chart with missing labels asks the audience to guess.

Check for:

  • a descriptive chart title;
  • clear category labels;
  • units when needed;
  • a readable legend when there is more than one series; and
  • no private information.

A title like Chart 1 is weak.

A title like Portfolio Artifacts by Category tells the audience what they are seeing.

Write a bounded claim

A bounded claim says what the chart supports and what it does not support.

Weak claim:

My portfolio is good.

Better claim:

The chart shows that my current portfolio has more website artifacts than spreadsheet artifacts, based on the six records I entered this week.

That claim identifies the data and the limit.

It does not pretend the chart proves overall quality.

Lab 5: Create the chart and evidence note

Use your spreadsheet from Lesson 4.

Create one chart from a selected range.

Then write an evidence note:

Question:
Selected data range:
Chart type:
Chart title:
Claim supported:
Limitation:

Example:

Question: Which portfolio artifact categories appear most often?
Selected data range: Category counts table
Chart type: Bar chart
Chart title: Portfolio Artifacts by Category
Claim supported: Website artifacts are the largest category in this six-item dataset.
Limitation: The chart counts artifacts; it does not judge quality.

Add evidence to the portfolio

Add the chart or a teacher-approved representation of the chart to your portfolio.

Include:

  • the chart image or spreadsheet link/file reference;
  • the evidence note;
  • the date or week label; and
  • a short explanation of what changed in your portfolio this week.

If your portfolio is not public, save the update in the assigned classroom location.

Review your Week 2 bundle

You should now have:

  • a navigation audit;
  • an accessibility or organization repair;
  • a three-slide presentation draft;
  • a spreadsheet with records and formulas;
  • one chart with a bounded claim; and
  • an updated portfolio evidence section.

These are connected. The portfolio shows the work, the presentation explains part of the work, and the spreadsheet organizes evidence about the work.

Evidence checkpoint

Your Week 2 evidence is ready when another person can inspect it and answer:

  • What changed in the portfolio?
  • What presentation artifact did you create?
  • What records exist in the spreadsheet?
  • What formula or chart did you use?
  • What claim does the chart support?
  • What claim would be too strong?

That last question is important. Data work is stronger when you know its limits.