Question

old faithful eruptions
what correlation does the graph show?
as eruption duration increases, waiting time between eruptions increases.
as eruption duration decreases, waiting time between eruptions increases.
as eruption duration decreases, waiting time between eruptions decreases.
as eruption duration increases, waiting time between eruptions decreases.

Explanation:

In a scatter - plot, if the general trend of the data points (and the regression line) is such that when one variable (here, eruption duration) increases, the other variable (waiting time between eruptions) also increases, it shows a positive correlation. Looking at the given scatter - plot, as the eruption duration (x - axis) increases, the waiting time between eruptions (y - axis) also has an increasing trend.

Answer:

As eruption duration increases, waiting time between eruptions increases.