The quantities
�
xx and
�
yy are proportional.
�
xx
�
yy
3
33
30
3030
10
1010
100
100100
16
1616
160
160160
Find the constant of proportionality
(
�
)
(r)left parenthesis, r, right parenthesis in the equation
�
=
�
�
y=rxy, equals, r, x.
�
=
r=r, equals
