<p><a target="_blank" href="https://www.prepswift.com/quizzes/quiz/prepswift-a-very-important-equation">A Very Important Equation Exercise</a></p><p>I'm just going to come right out and say it. Here's <span style="color:#27ae60;">A Very Important Equation</span>:</p>
<p><span style="font-size:28px;"><strong>$$y=mx+c$$</strong></span></p>
<p><strong><span style="color:#8e44ad;">Why is it so important?</span></strong></p>
<p>Because it gives a crapton of information immediately. If you convert an equation into this form, this is what you get:</p>
<ul>
<li>$m =$ slope</li>
<li>$c = y$-intercept</li>
</ul>
<p>And of course $y$ and $x$ represent the $y$ and $x$-coordinates of points that satisfy the equation.</p>
<p><strong>Note</strong>: This equation is sometimes called <span style="color:#e74c3c;">slope-intercept form</span>.</p>