It should beA curve has gradient function

and passes through the origin and the point (1,2). Find the equation if the curve.

I am not sure, how would I work out the value of k?

= (this is typed wrong ^^!)

Is this correct? If so from here, how would I proceed?

I have two unknowns, so unable to put the values of x and y given.

But your answer is still right.

There are two points (0,0) and (1,2), so

and

From two above equations, you can solve for k and C