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Average plant height is not affected by the amount of multivitamin.
A line allows you to better visualize the trend of the graph.
There are various ways, such as using gradients in Conditional Formatting or trendlines on charts and functions such as TREND and FORECAST.
The diagonal lines show how the values change over time, also known as a trend
guide lines
What is urbanisation and its opportunities to the marketers?
Then relate it to international marketing ?