Question

How is a relationship determined when looking at a scatterplot?

Answer 1

As the input increases, the output increases.

As the input increases, the output decreases.

As the input increases, the output stays the same.

There is no relationship displayed by the points.

Answer 2

Scatter plots are similar to line graphs in that they use horizontal and vertical axes to plot data points. However, they have a very specific purpose. Scatter plots show how much one variable is affected by another. The relationship 
between two variables is called their correlation .