Ais used to us visualize the correlation or association between two variables

The answer is scatterplot. Scatterplot front direction, form, and strength both two quantitative variables. In creating scatterplot you should  giving focus on relationships, and avoid extra blank space, In also draw an axes on the scatterplot in  Both axes should be given the similar emphasis, resulting in plots that are square rather than rectangular in shape. When making or studying a scatterplot, keep in mind that our eyes can be fooled by changing the plotting scales or the amount of white space around the cloud of points.

now you can mark brain hope this

permafrost layer, it exists beneath a layer of soil, rock or sediment.