The standard Laffer Curve
Vectorisation by <a href="https://en.wikipedia.org/wiki/User:Vanessaezekowitz" class="extiw" title="en:User:Vanessaezekowitz">Vanessaezekowitz</a> at <a class="external text" href="https://en.wikipedia.org">en.wikipedia</a>
CC BY 3.0
This SVG version is based on <a href="https://en.wikipedia.org/wiki/User:Djzanni" class="extiw" title="en:User:Djzanni">Djzanni</a>'s <a href="//commons.wikimedia.org/wiki/File:Laffer_Curve.png" title="File:Laffer Curve.png"> original PNG version</a>