The table shows the number of cups of caramel required for different amounts of flour in a caramel cookie recipe. The ratio of cups of caramel to cups of flour is constant. Cups of Flour 5 10 20 25
Cups of Caramel 3 6 c 15

Let c = cups of caramel needed when using 20 cups of flour

Which proportion can be used to determine the value of c?

A.
B.
C.
D.

c=12  

Step-by-step explanation:

if 3 cups of caramel is 5 cups of flour we can count/multiply by 5's t get the answer.  3:5 can be scaled from using first the cups of flour to determine how much we must scale by to get 20. Then we scale using the multiples of 3.

3:5 can be scaled to 10:12

the slope of the first function is -3. (3/1)

the slope of the second function is 1. (13-10/6-3).

since |-3| is greater than |1|, the function with the steepest slope is the first.

the answer to the question is a  

it has the same slope and the same y-intercept.