Which of these r= values represents the strongest correlation

-0.5
-0.8
-0.6
-0.7

The R value ranges from -1 (perfect negative correlation) to 1 (perfect positive correlation). 0 means that the variables are not linearly correlated.

So, the strongest correlation is represented by the value -0.8

Step-by-step explanation:

Correlation ranges from -1 to 1, and shows us how two variables relate to each other and its sign its magnitude.

The strongest ones are when Since the maximum strongest negative correlation is when r=-1, then is the strongest correlation enlisted above.

256π units²   (answer b)

step-by-step explanation:

the formula for the surface area of a sphere of radius r

is             a = 4πr²

and so, if r = 8 units, then the surface area is:

a = 4π(8 units)² = 256π units²   (answer b)