Complete the following test so you can be sure you understand the material. Your answers are private, and test results are not scored.
When would need a trendline?
To link together all the data points on your chart.
To make the chart more interesting.
To see how a suspected relationship fits your data.
To plot a precise line across your data exactly where you want it.
You can only add linear trendlines in Excel charts.
You want to plot a chart of Pressure against Volume. Which sort of chart should you use?
From the practice session, to investigate what happens to your trendline beyond your data range you can use:
The line equation and work out further values.
Bonus question: What is R²?
The difference between the actual data point value and the nearest part of the trend line.
A number between 0 and 1 that represents the standard deviation of the data.
A scientific symbol for the square of electrical resistance.
A number between 0 and 1 that reveals how closely the estimated values for the trendline correspond to your actual data.