Exponentiate both sides of the equation (raise the ln by e). Then you get y=x*e^(c). Because c is a constant and e is a number it can be absorbed and called k, thus you get y=kx
Question is to solve
I'm completely lost with these, this is as far as I get and then I'm not sure what to do. I get as far as this
i know they need to be integrated from here so
where c is my constant
the answer given in the text is