Localized Trendlines
LSP 120
Week 6
Joanna Deszcz

Let’s Interpret This Graph
What would a trendline look like?

Let’s Interpret This Graph
What would a trendline look like?

Let’s Interpret This Graph
But what about this downward trend?

Let’s Interpret This Graph
Maybe we should do a trendline for just this downward segment.

Let’s Interpret This Graph
Is the Localized Trendline more accurate than the overall trendline?

An Example

Percentcollegewomen.xls

Adding a Localized Trendline

Step 1
◦ Create and xy scatter plot of the data
◦ Is a localized trendline needed?
◦ Yes if…
 Low R 2 value
 Trendline doesn’t fit the data points
 Trend changes direction
60
US Females enrolled in
Higher Education 1910-
2000
50
40
30
20
10
0
1900 y = 0.1497x - 248.76
R² = 0.2885
1950
Year
2000 2050

Adding a Localized Trendline

Step 2
◦ Remove the original trendline
◦ Select and copy the data that represents the newest trend
◦ Click on the chart to activate it
◦ Choose Paste Special from the Paste menu

Adding a Localized Trendline

Step 3
◦ Add cells as a new series
◦ Category (X values) in
First column

Adding the New Trendline

Step 4
◦ Right-click on any of the new data points
◦ Choose Add Trendline from menu

Trendline Dialog Box


Select Linear
Trendline
Select
◦ Display Equation
◦ Display Rsquared value

The New Trendline
70
US Females enrolled in Higher Education
1910-2000 y = 0.59x - 1120.8
R² = 0.8764
60
50
40
30
20
10
0
1900 1920 1940 1960
Year
1980 2000 2020

Animation in PowerPoint



Once the chart is complete…
You can animate it with PowerPoint to emphasize your points
Here’s how….

PowerPoint




Open a blank presentation
Add a new slide
◦ Home – Slides – New Slide
Copy your chart from Excel and paste it on the slide
You may delete the title slide if you wish

Add Animation



Click on the chart to activate it
Click on the Animation Tab
Choose Custom Animation
› Click Add Effect
› Entrance
› Choose an effect
› Can modify speed and place of entrance as well
› Click on drop down arrow next to “Content
1 Placeholder”

Continued…



Choose Effect Options
Choose Chart Animation tab
Select Group Chart – By Series Option
◦ View slide show to see results
◦ Chart parts should come in in stages
 First chart
 Second, original data
 Third, trendline and localized data, predition, shapes

Design your Slides

Click on the Design tab to add custom or preformatted colors and designs to your slides