Ms. Thornton's class visited five freshwater lakes to learn more about the crocodiles and alligators living in them. The class counted the number of species in each lake as shown in the table.

Lake Crocodiles Alligators
A 4 5
B 21 35
C 3 9
D 6 16
E 24 30

The relationship between the number of crocodiles and the number of alligators is not proportional across all lakes. Only two of the lakes have crocodiles and alligators in the same proportion. Which two lakes are they?
A.
lake A and lake B
B.
lake B and lake C
C.
lake A and lake E
D.
lake C and lake D

Question

Ms. Thornton's class visited five freshwater lakes to learn more about the crocodiles and alligators living in them. The class counted the number of species in each lake as shown in the table.

Lake Crocodiles Alligators
A 4 5
B 21 35
C 3 9
D 6 16
E 24 30

The relationship between the number of crocodiles and the number of alligators is not proportional across all lakes. Only two of the lakes have crocodiles and alligators in the same proportion. Which two lakes are they?
A. 
lake A and lake B
B. 
lake B and lake C
C. 
lake A and lake E
D. 
lake C and lake D

Shadow · Answer

Simplify each ratio
A 4:5
B 21:35 -> 3:5 (divide by 7)
C 3:9 -> 1:3 (divide by 3)
D 6:16 -> 3:8 (divide by 2)
E 24:30 -> 4:5 (divide by 6)