Solution to Opposite Lines

let: f(x)=-g(x),h(x)=1/g(x)

In this challenge, we wanted to find the antiderivative of f(x), given the above, and that the derivative of h(x) is 0.5. First, lets find f(x) in terms of h(x).

f(x)=-1/h(x)

Then we can find the derivative of f(x) to be -2. The antiderivative of this, f(x), is -2x+c. The antiderivative of f(x), therefore, is -x^2+cx+c

-x^2+cx+c