The correct answer is: True.
gvisAnnotationChart charts are interactive time series line charts that support annotations. Annotations are labels that can be added to the chart to provide additional information about the data. They can be used to highlight specific points on the chart, or to provide additional context for the data.
To add an annotation to a gvisAnnotationChart chart, you can use the gvis.annotation() function. This function takes a number of arguments, including the text of the annotation, the position of the annotation, and the color of the annotation.
For example, the following code will add an annotation to a gvisAnnotationChart chart with the text “This is an annotation” at the position (100, 200) and the color red:
gvis.annotation(chart, "This is an annotation", 100, 200, "red")
Annotations can be used to provide additional information about the data in a gvisAnnotationChart chart. They can be used to highlight specific points on the chart, or to provide additional context for the data.