Question

"3. Four relationships are given.

Relationship A: x 3 2 1 y 2 2/3 1 2 / 3 2/3 Relationship B: 2x=y
Relationship C: y=2+x
Relationship D: x 3 6 y 6 12 In which two relationships are the constant of proportionality 2?"

Answer 1

B and D

Explanation:

A - check to see IF the relationship is proportional by dividing each y by its associated x:

2 2/3 ÷ 3 = 8/9

1 2/3 ÷ 3 = 5/9

2/3 ÷ 3 = 2/9

none of these match, so not even proportional

B - CoP is the coefficient of x (2)

C - not proportional because of the +2

D - do the same as A

6/3 = 2

12/6 = 2

both are the same and equal to 2