Question 390108
{{{x = (ks^2)/t}}}, where k is the constant of proportionality. Then
{{{x = (k(2s)^2)/t = 4((ks^2)/t)}}}.  So the value of x is quadrupled when s is doubled.
{{{x = (k(2s)^2)/(2t) = 2((ks^2)/t)}}}. So the value of x is doubled when both s and t are doubled.