What does the graphic tell?

A plot can be very useful to explore the relationship between two variables. If you pass the plot() function two arguments, the first one will be plotted on the x-axis, the second one will be plotted on the y-axis.

The sugar trading data is again available at http://assets.datacamp.com/production/course_1478/datasets/trade.dta.

After you've imported the data frame, you should plot two of its variables, Import against Weight_I, and describe their relationship! haven is already loaded in your R session, so you can start importing straight away.

Possible Answers

The relation between the import figures in USD and the import figures in weight can be described with a quadratic function that has a local maximum.
The import figures in USD and the import figures in weight are rather positively correlated.
The import figures in USD and the import figures in weight are negatively associated. Along the points there is a monotonic decreasing trend.
No relationship can be guessed between the weight and the value of the imported sugar.

Exercise

What does the graphic tell?

Instructions

Possible Answers