Scatter plots in Excel - Cheat Sheet & Quick Revision

Recall & Review

beginner

What is a scatter plot used for in Excel?

A scatter plot shows the relationship between two sets of numbers by plotting points on an X and Y axis. It helps to see patterns or trends.

beginner

How do you create a scatter plot in Excel?

Select your two columns of data, go to the Insert tab, click on the Scatter chart icon, and choose the style you want.

beginner

What do the X and Y axes represent in a scatter plot?

The X axis shows the independent variable, and the Y axis shows the dependent variable you want to compare or analyze.

intermediate

How can you add a trendline to a scatter plot in Excel?

Click on any data point in the scatter plot, then right-click and choose 'Add Trendline'. You can select the type of trendline you want.

intermediate

Why would you use a scatter plot instead of a bar chart?

Scatter plots show how two variables relate to each other with points, while bar charts compare amounts. Scatter plots are better for spotting correlations.

What type of data is best for a scatter plot?

A One set of text data

B Single numbers

C Dates only

D Two sets of numerical data

Scatter plots require two numerical data sets to plot points on X and Y axes.

Where do you find the scatter plot option in Excel?

A Data tab > Sort & Filter group

B Home tab > Clipboard group

C Insert tab > Charts group

D Review tab > Comments group

Scatter plots are inserted from the Insert tab under the Charts group.

What does a trendline in a scatter plot show?

A The relationship or pattern between variables

B The average value of data points

C The total sum of data points

D The labels of data points

A trendline helps visualize the pattern or correlation between the two variables.

If your scatter plot points form a straight line going up, what does it mean?

A No relationship

B Positive correlation

C Random data

D Negative correlation

A rising line means as one variable increases, the other also increases, showing positive correlation.

Can scatter plots show categories like 'Apples' or 'Oranges'?

A No, scatter plots need numbers

B Yes, directly

C Only if you use colors

D Only in 3D scatter plots

Scatter plots require numerical data for both axes, not text categories.

Explain how to create and customize a scatter plot in Excel.

Think about the steps from selecting data to adding extra features.

Describe when and why you would use a scatter plot instead of other chart types.

Focus on the purpose and data type for scatter plots.

Practice

1. What is the main purpose of a scatter plot in Excel?

easy

A. To show the relationship between two sets of numbers using dots

B. To display data as a pie chart

C. To calculate the sum of numbers in a column

D. To sort data alphabetically

Solution

1. Step 1: Understand scatter plot basics

   A scatter plot uses dots to show how two sets of numbers relate to each other.

2. Step 2: Compare options to definition

   Only To show the relationship between two sets of numbers using dots describes this correctly; others describe different chart types or functions.

3. Final Answer:

   To show the relationship between two sets of numbers using dots -> Option A

4. Quick Check:

   Scatter plot = relationship with dots [OK]

Hint: Scatter plots show dots for two number sets [OK]

Common Mistakes:

• Confusing scatter plots with pie charts
• Thinking scatter plots sort data
• Believing scatter plots calculate sums

2. Which of these is the correct way to insert a scatter plot in Excel?

easy

A. Select data, then go to Insert > Scatter Chart

B. Select data, then press Ctrl + S

C. Select data, then go to Home > Conditional Formatting

D. Select data, then right-click and choose Sort

Solution

1. Step 1: Recall Excel menu for charts

   Scatter plots are inserted via the Insert tab under Scatter Chart options.

2. Step 2: Eliminate incorrect options

   Ctrl + S saves, Conditional Formatting colors cells, Sort arranges data; none insert charts.

3. Final Answer:

   Select data, then go to Insert > Scatter Chart -> Option A

4. Quick Check:

   Insert > Scatter Chart = correct way [OK]

Hint: Use Insert tab to add scatter plots [OK]

Common Mistakes:

• Using save shortcut instead of chart insert
• Confusing formatting with chart insertion
• Trying to sort data to create charts

3. Given data in columns A and B: A1=1, A2=2, A3=3; B1=2, B2=4, B3=6. What pattern will the scatter plot show?

medium

A. A curve bending downward

B. A straight line showing a positive linear relationship

C. Random dots with no clear pattern

D. Dots clustered at zero

Solution

1. Step 1: Analyze the data pairs

   Pairs are (1,2), (2,4), (3,6). B values are double A values, showing a linear pattern.

2. Step 2: Understand scatter plot pattern

   Since B increases proportionally with A, dots form a straight line with positive slope.

3. Final Answer:

   A straight line showing a positive linear relationship -> Option B

4. Quick Check:

   Doubling values = straight positive line [OK]

Hint: Check if one column doubles the other for linear line [OK]

Common Mistakes:

• Assuming random scatter without checking values
• Thinking the line curves without data reason
• Ignoring proportional increase in values

4. You created a scatter plot but the dots are missing. What is the most likely cause?

medium

A. You forgot to save the file

B. Chart type chosen was Pie Chart instead of Scatter

C. Excel file is corrupted

D. Data selected includes empty or non-numeric cells

Solution

1. Step 1: Identify common scatter plot issues

   Scatter plots require numeric data; empty or text cells cause no dots to appear.

2. Step 2: Evaluate other options

   Pie chart would show a different chart, file corruption or saving issues don't cause missing dots specifically.

3. Final Answer:

   Data selected includes empty or non-numeric cells -> Option D

4. Quick Check:

   Non-numeric data = no dots [OK]

Hint: Ensure all selected data cells have numbers [OK]

Common Mistakes:

• Choosing wrong chart type but expecting scatter dots
• Blaming file corruption without checking data
• Thinking saving affects chart display immediately

5. You have monthly sales data in column A and advertising spend in column B. How can you use a scatter plot to find if higher advertising spend increases sales?

hard

A. Plot sales and advertising spend both on Y-axis

B. Create a pie chart of sales percentages

C. Plot sales on Y-axis and advertising spend on X-axis to see correlation

D. Sort the data by sales before plotting

Solution

1. Step 1: Understand axes roles in scatter plots

   Independent variable (advertising spend) goes on X-axis; dependent (sales) on Y-axis to check influence.

2. Step 2: Evaluate options for correct plotting

   Plotting both on Y-axis or pie chart won't show relationship; sorting data doesn't create scatter plot.

3. Final Answer:

   Plot sales on Y-axis and advertising spend on X-axis to see correlation -> Option C

4. Quick Check:

   Independent X, dependent Y shows correlation [OK]

Hint: Put cause on X-axis, effect on Y-axis [OK]

Common Mistakes:

• Plotting both variables on same axis
• Using pie chart instead of scatter plot
• Sorting data instead of plotting relationship