You have three tasks which involve numeric data visualization. Which plot is best for each of the tasks?
Task A: there are two variables. You'd like to see if there's any relationship between them.
Task B: there is only one variable. You want to see the mean and median of distribution and detect the outliers.
Task C: there is only one variable. You need to see the shape of distribution: whether it's symmetrical or not and how many peaks it has.