Plot of three <a href="https://en.wikipedia.org/wiki/Exponential_function" class="extiw" title="en:Exponential function">exponential functions</a> in the interval [-1, 1]:
<ul><li><span class="mwe-math-element"><span class="mwe-math-mathml-inline mwe-math-mathml-a11y" style="display: none;"><math xmlns="http://www.w3.org/1998/Math/MathML" alttext="{\displaystyle y(x)=2^{x}}"><semantics><mrow class="MJX-TeXAtom-ORD"><mstyle displaystyle="true" scriptlevel="0"><mi>y</mi><mo stretchy="false">(</mo><mi>x</mi><mo stretchy="false">)</mo><mo>=</mo><msup><mn>2</mn><mrow class="MJX-TeXAtom-ORD"><mi>x</mi></mrow></msup></mstyle></mrow><annotation encoding="application/x-tex">{\displaystyle y(x)=2^{x}}</annotation></semantics></math></span><img src="https://wikimedia.org/api/rest_v1/media/math/render/svg/8117d5e6c67aff1174fa7201be3b4204642275a6" class="mwe-math-fallback-image-inline" aria-hidden="true" style="vertical-align: -0.838ex; width:9.728ex; height:2.843ex;" alt="{\displaystyle y(x)=2^{x}}"></span></li>
<li><span class="mwe-math-element"><span class="mwe-math-mathml-inline mwe-math-mathml-a11y" style="display: none;"><math xmlns="http://www.w3.org/1998/Math/MathML" alttext="{\displaystyle y(x)=e^{x}}"><semantics><mrow class="MJX-TeXAtom-ORD"><mstyle displaystyle="true" scriptlevel="0"><mi>y</mi><mo stretchy="false">(</mo><mi>x</mi><mo stretchy="false">)</mo><mo>=</mo><msup><mi>e</mi><mrow class="MJX-TeXAtom-ORD"><mi>x</mi></mrow></msup></mstyle></mrow><annotation encoding="application/x-tex">{\displaystyle y(x)=e^{x}}</annotation></semantics></math></span><img src="https://wikimedia.org/api/rest_v1/media/math/render/svg/ec5ebaa43d601e8759efe4ea6d8d9b44df6e4257" class="mwe-math-fallback-image-inline" aria-hidden="true" style="vertical-align: -0.838ex; width:9.649ex; height:2.843ex;" alt="{\displaystyle y(x)=e^{x}}"></span></li>
<li><span class="mwe-math-element"><span class="mwe-math-mathml-inline mwe-math-mathml-a11y" style="display: none;"><math xmlns="http://www.w3.org/1998/Math/MathML" alttext="{\displaystyle y(x)=10^{x}}"><semantics><mrow class="MJX-TeXAtom-ORD"><mstyle displaystyle="true" scriptlevel="0"><mi>y</mi><mo stretchy="false">(</mo><mi>x</mi><mo stretchy="false">)</mo><mo>=</mo><msup><mn>10</mn><mrow class="MJX-TeXAtom-ORD"><mi>x</mi></mrow></msup></mstyle></mrow><annotation encoding="application/x-tex">{\displaystyle y(x)=10^{x}}</annotation></semantics></math></span><img src="https://wikimedia.org/api/rest_v1/media/math/render/svg/40e16f93abba95bb82eb68222a72a2b7740c85f2" class="mwe-math-fallback-image-inline" aria-hidden="true" style="vertical-align: -0.838ex; width:10.89ex; height:2.843ex;" alt="{\displaystyle y(x)=10^{x}}"></span></li></ul>
where <i>e</i>≈2.718 is <a href="https://en.wikipedia.org/wiki/E_(mathematical_constant)" class="extiw" title="en:E (mathematical constant)">Euler's number</a>
<a href="//commons.wikimedia.org/wiki/User:Geek3" title="User:Geek3">Geek3</a>
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<span class="int-own-work" lang="en">Own work</span>