Ababy elephant weighs 200 pounds at birth. seven years later, the elephant's weight is 3,000 pounds.

what is the rate of change of the weight of the elephant?
a) 400 pounds per year
b) 429 pounds per year
c) 457 pounds per year
d) 466 pounds per year

your answer is d 2,500

step-by-step explanation:

a 4/6 = 9/12   not proportional

step-by-step explanation:

to find which are not proportional, we can use cross products

if it is true, they are proportional.   if it is not true, they are not proportional.

a 4/6 = 9/12

4* 12 = 6*9

48 = 54

not this is not proportional  

b 2/3 = 12/18  

2* 18 = 3 * 12

36 = 36

this is proportional

c 5/4 = 10/8  

5*8 = 4*10

40 = 40

this is proportional

d 7/5 = 35/25

7*25 = 5 * 35

175 = 175

is proportional

asdsad

step-by-step explanation: