Which scatterplot demonstrates the strongest relationship between two quantitative variables?

Which scatterplot demonstrates the strongest relationship between two quantitative variables?

A graph has x on the x-axis, and y on the y-axis. Points are scattered throughout the graph. A graph has x on the x-axis, and y on the y-axis. Points curve up and then down in a line. A graph has x on the x-axis, and y on the y-axis. Points increase loosely together.

A graph has x on the x-axis, and y on the y-axis. Points decrease loosely together.