Plotting Mathematica: Michaelis-Menten Rate of Uptake

[Dustinsfl]

So the Michaelis-Menten rate of uptake is
$$
R_0 = \frac{Q_{s_0}}{K_m+s_0}
$$
where $K_m=\dfrac{k_{-1}+k_2}{k_1}$ and $Q_{s_0}=k_2e_0s_0$

Q is the max velocity K_m is the Michaelis constant.

How can I plot this in Mathematica?

 

[Dustinsfl]

How can I plot this in Mathematica?

<< PlotLegends`
 Plot[{x*(1 + x)/(1 + x + x^2), x^2/(1 + x + x^2)}, {x, 0, 5}, 
 PlotLegend -> {"Michaelis-Mendel", "k_2=0"}, 
 LegendPosition -> {0, -.45}, Joined -> {True, True}, 
 PlotMarkers -> Automatic]

Plot markings aren't working. How can I get this to work?

 

[Dustinsfl]

​Solved