Question

Please help me with this. Thank you!

Answer 1

Answer:

First choice listed

Step-by-step explanation:

Pick 2 points from the table and find the slope between them.  I chose (30,12) and (20,8).  Apply the slope formula to find the cost per CD:

$\frac{Cost}{CD}= \frac{30-20}{12-8}=\frac{5}{2}$

The function then is C = 5/2d. or C = 2.5d, first choice

Answer 2

C = 2.5d. Plugging in for d and C we get the same solution on each side