1. Quiz-tion: There is a theory that strongly influenced the packages ggplot2 and ggvis. This theory is known as:
   1. String theory
   2. Best polygon
   3. Grammar of Graphics
   4. None of the above
2. Quiz-tion: Pick the false statement about interactive graphics.
   1. They are appropriate for web pages
   2. They don't ever allow the audience to zoom in and out
   3. The ggvis and plotly packages allow users to build interactive plots
   4. The rCharts and googleVis packages allow users to build interactive plots
3. Quiz-tion: Which of the following statements is false?
   1. Overplotting can sometimes be softened by a technique called alpha transparency
   2. Data manipulation and preprocessing is never required before drawing a plot
   3. Plots made by ggplot2 cannot be made interactive, not even with the aid of packages such as shiny or plotly
   4. Knowing HTML and JavaScript can sometimes be helpful while crafting interactive plots with rCharts

Answers—executing the following code will give you the answers to the quiz questions:

set.seed(10)
round(runif(3,1,4))