If the correlation between variable a and variable b is .20, then variable a explains of the variance in variable b.

The answer would be b. I think.

3,000,540

step-by-step explanation:

look at the picture.

y-intercept for the function on a picture is 4 → point (0, 4).

y-intercept for the function

is for x = 0. substitute:

y-intercept is 8 → point (0, 8).