Question

Which is the best representation of a nonlinear association?
On a graph, points are grouped together to form a curved line.
On a graph, points are grouped closely together and increase.
On a graph, points are grouped closely together and increase.
On a graph, points are grouped closely together and decrease.

Answer 1

"On a graph, points are grouped together to form a curved line."

This describes a curved pattern (nonlinear). The other options describe linear associations (increase = positive linear, decrease = negative linear).