20 * (31/100) = 21*0.31=6.51
20.00-6.51=13.49
Caleb paid $13.49
Rewrite the inequality as

by adding 4 to both sides.
So, you want to pick only the values that are strictly less than 12, i.e. all of the values except 13.
It's really hard to tell for anyone who can't see the table.
Sadly, you've left ALL of us in that awkward status.
Answer:
Hope this helps :)
Step-by-step explanation:
A scatter plot is a two-dimensional diagram that displays individual data points based on the intersection of two variables, shown as vertical and horizontal axes. Individual data points or values are plotted at particular coordinates of the two variables being studied. Patterns of data points provide a visual representation of relationship between the two variables. A wide range of jobs and careers use this valuable analytical tool for data analysis and decision making.
My conclusion,
They help organize important data for future occurences.