Question

find differentiation of y upon differentiation of x if x=at square2 and y=2at

Answer 1

dy/dx=dy/dt/dx/dt=d(2at)/dt/d(at^2)/dt=2a/2at
=1/t

Answer 2

x=at^2
y=2at
x differenciate with respect to t
dx/dt=2at
and
y differenciate w.r.t t
dy/dt=2a
=dy/dx=1/t