Which steps could be used to solve this story problem? the zoo has 20 birds in the enclosure. twelve of the birds are blue, 3 are red, and the rest are orange. how many birds are orange? a. multiply 12 × 3. then add that product to 20. b. add 12 and 3. subtract the sum from 20. c. subtract 3 from 12. then add that difference to 20. d. divide 20 ÷ 12. then add 3 to that quotient.

1.4

2.3

step-by-step explanation:

the formula for the constant of variation is

y= kx

divide each side by x

y/x =kx/x

y/x =k

we know a and y

1.   y/x = k

4/1 =4

check the other values to make sure they are the same

8/2 = 4   12/3 =4   and 16/4 =4  

the constant of variation is 4

2.   y/x = k

3/1 =3

check the other values to make sure they are the same

6/2 = 3   9/3 =3   and 12/4 =3  

the constant of variation is 3