Does anyone know how to do this i am not sure how to solve this !

The answers are given below as the most appropriate  options among the given options.

Step-by-step explanation:

1. There is no correlation between income and phone usage.

2. There is a correlation between no. of CD's purchased and no. of songs downloaded. However, there is no causation. This is because there is a decrease in the no. of CD's purchased with an increase in the no. of songs downloaded.

3.There is no correlation between no. of hits and no. of balls caught.

rx and sx

step-by-step explanation:

f(x) has value 150 at x= 0

and 0 at x= 3

so d(f(x))/dt = slope = -150/3 = -50