What does the option 'cex' do in the following R function? text(0, 1, "Hello", cex=2)

In the plot( ) function, what option is used to specify that the x-axis displays values from 0 to 1?

What is the output of the following R code? x<-2; y <- c(1:3); paste("The value of x is", x, "and the value of y[x] is", y[x], sep=" ")

What's the output for command: seq(from = 1, to = 5, by = 3)

Which R function adds a line with slope 1 and intercept 0 into an existing plot of Y versus X?

What is the output of this command: > is.na( c( 1:3, NA ) )

What statement shows the objects on your workspace?

How does a vector differ from a list?

What is mydf$y in this code? mydf <- data.frame(x=1:3, y=c("a","b","c"), stringAsFactors=FALSE)

You accidentally display a large data frame on the R console, losing all the statements you entered during the current session. What is the best way to get the prior 25 statements back?

Which function displays the first five rows of the data frame named pizza?