The quantities xxx and yyy are proportional.

xxx yyy

222 141414

666 424242

111111 777777

Find the constant of proportionality (r)(r)left parenthesis, r, right parenthesis in the equation y=rxy=rxy, equals, r, x.

r =r

Therefore the constant of proportional is r=7.

Step-by-step explanation:

The quantities x and y are proportional.

      x                y

i)     2              14

ii)    6               42

iii)   11               77

Since x and y are proportional.

y= rx

(i)

Now plug y= 14 and x=2

14=r.2

(ii)

Now plug y= 42 and x=6

42=r.6

(iii)

Now plug y=11 and x=77

77=r.11

Therefore the constant of proportional is r=7.

i think the correct option is the second option.