In this first part of this assignment, we will fit equations for dose$-$effectiveness curves $($Hill equation$)$ and dose toxicity curves for $7$ different drugs.

$y=\frac{[x{]}^{}}{E{C}_{50}^{}+[x{]}^{}}$

$x$ dose

$$ Hill coef

$E{C}_{50}\frac{1}{2}$ saturation constant

$y$ is either toxisity or efficacy

Question: Write a function that represents the Hill equation in python.