Answer :
y = kx
where:
k= constant of proportionality
y = 2 when x = 4
Replace:
2 = k4
Solve for k
2/4 = k
k= 1/2
Equation:
y= 1/2 x
constant of proportionality = 1/2
y = kx
where:
k= constant of proportionality
y = 2 when x = 4
Replace:
2 = k4
Solve for k
2/4 = k
k= 1/2
Equation:
y= 1/2 x
constant of proportionality = 1/2