<p>Okay, my online math course ends On Tuesday, but all the work is due by Monday at 5:00pm.</p>
<p>The course is not written very well and I'm having some trouble. </p>
<p>How do I find the equation of an exponential function with only a graph of the function?</p>
<p>estimate using points? and the shape of the graph to figure out the power of x</p>
<p>Use a graphing calculator and plug in possibilities for the y=. If it's an S shaped graph, use x^3, is it's a parabola, try x^2 or x^4</p>
<p>Find the roots of the function by determining where it hits the x-axis. Say it crosses at -2, 3, and 4. That gives you x=-2,3,4 as your roots. If you had an equation and were solving for the roots, this would mean your factored equation would have to have been (x+2)(x-3)(x-4)=0 to find those x-values. Therefore, your equation in that instance would be y=(x+2)(x-3)(x-4), or you can choose to multiply it out to get a polynomial. </p>
<p>Hopefully that makes sense, it's hard to explain in writing.</p>
<p>Thank you. <em>palmforehead</em> I have the answer key for that module. <em>cue dee dee dee</em></p>