Question

As x increases, y decreases; r= -0.87
which graph best describes this?

Answer 1

If y decreases as x increases, we are looking for a negative slope. The r = -0.87 tells us that the data points correlate relatively well. The closer the decimal is to 1 or -1, the better. The answer is A.

Answer 2

Option A - Graph A

Explanation:

Given : Scatter plot as x increases, y decreases; r= -0.87.

To find : Which graph best describes this?

Solution :

The correlation r measures the strength of the linear relationship

between two quantitative variables.

r<0 indicate a negative association.

If y decreases as x increases, there is a negative slope.

As Option A and D are negative slope.

In Option D The scatter plot is when r=-0.5 as points scatter a lot.

In Option A the data points correlate relatively well. The closer the decimal is to 1 or -1, the better.

Therefore, Option A is correct.

As x increases, y decreases; r= -0.87 - The graph A.