Which of these r-values represents the weakest correlation? a: -0.55 b: -0.35 c: -0.25 d: -0.45

Apply the absolute value to each number. In other words, remove the negative sign to determine the positive version of that number.

-0.55 turns into 0.55
-0.35 turns into 0.35
-0.25 turns into 0.25
-0.45 turns into 0.45

The smallest result is 0.25, which is closest to 0. The closer r is to 0, the weaker the correlation. 

Choice C) -0.25

The correct answer would be the function g(x) increased at a faster rate