The answer would have to be D.
Sorry , idk .........................
An equation is said to have a constant of proportionality if 'x' is a multiple of 'y' or 'y' is a multiple of 'x'.
Now, we have to determine an equation with constant of proportionality as '1'.
1.
This equation has constant of proportionality as '
'.
2.
This equation has constant of proportionality as '
'.
3.
This equation has constant of proportionality as '
'.
4.
This equation has constant of proportionality as '1'.
Option D is the correct answer.
Set it up as an equation. "A number" is x.
2x-2=x+64
Move all of the x terms to one side by subtracting x from both sides, then add 2 to both sides to isolate x.
X=66
The number is 66