Maths: parameetric equations i think?

Question

The parabola x^2 = 4ay can be represented by x=2at & y = at^2

At the point A (2at, at^2), find the grandient of the tangent to the parabola at A (using differentiation)

Answer 1

differentiation the equation

x^2=4ay

differenting

2x=4a*dy/dx

or dy/dx=2x/4a= gradient=2*2at/4a  [put x=2at]

or gradient=t