Which of the following methods should be employed in the code to display a plot()?

1. show()
2. display()
3. execute()
4. plot()

Which of the following statements is used to create a histogram of 'step' type with 20 bins?

1. plt.hist(x, bins = 20, histtype = "barstacked")
2. plt.hist(x, bins=20)
3. plt.hist(x, bins=20, histtype="step")
4. plt.hist(x, bins=20, histtype=hist())

Which of the following is an incorrect example of savefig() function?

1. plt.savefig("bar1.pdf" )
2. plt.savefig("bar1.png")
3. plt.savefig("bar1.eps")
4. plt.savefig("bar1.ppt")

Which of the following plots makes it easy to visualize a trend in data over intervals of time.

1. Box plot
2. Histogram
3. Line Chart
4. Bar chart