# Chart – trendlines – slope – NDVI – visibleInLegend: true – GEE

Geographic Information Systems## How do you interpret trend lines?

**Interpreting a Trend Line**

- A trend line with a positive slope indicates a positive relationship between the variables.
- A trend line with a negative slope indicates a negative relationship between the two variables.

## How do you interpret a trendline in Excel?

**Additionally, Microsoft Excel allows displaying a trendline equation and R-squared value in a chart:**

- Trendline equation is a formula that finds a line that best fits the data points.
- R-squared value measures the trendline reliability – the nearer R
^{2}is to 1, the better the trendline fits the data.

## How to use a trendline equation to find a predicted value in Excel?

**Forecasting with the Trend line**

- Click on your line graph.
- Click the [ + ] button on the chart to open the chart elements menu.
- Choose the trend line (Linear or Exponential).
- Right Click the Trend line, Choose Format Trend line.
- Under Forecast choose the number of the period into the future you want to forecast.

## How do I extract a trendline equation in Excel?

**Right click on the trendline, “Formal Trendline” and click “Display Equation on chart”**.

## What does trendline tell you in data?

Trendlines, also known as lines of best fit or regression lines, **graphically illustrate trends in data series** and are commonly used when charting predictions. A trendline is typically a line or curve that connects or passes through two or more points in the series, showing a trend.

## What are the three types of trend lines?

Uptrend lines are upward sloping, and downtrend lines slope down. Uptrend lines are underneath prices, marking areas of potential support. Downtrend lines are possible resistance areas, and must be drawn above prices. It’s drawn between lows in a downtrend instead of between highs in a downtrend.

## How do you determine if the trendline is a good fit?

Trendline reliability **A trendline is most reliable when its R-squared value is at or near 1**. When you fit a trendline to your data, Graph automatically calculates its R-squared value. If you want, you can display this value on your chart.

## What is the slope of a trendline in Excel?

The slope is **the vertical distance divided by the horizontal distance between any two points on the line**, which is the rate of change along the regression line.

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