## DO THE MATH

Posted on December 23rd, 2011 by Bob and Joy Schwabach

You can type anything you want into the Google search bar, and the more specific the question, the better the answer. Now you can also use Google to graph equations.

Type in a function like “sin(x)” and Google will instantly chart it. As you move your cursor along the curve, you’ll see where you would be for different values of “x.” We put in “y= x*x,” the formula for a parabola, which is what you need for beam focus. Another site that does graphs for you is WolframAlpha.com, but we found Google’s easier to read.

Users of either site can also find answers to word problems with numerical answers, such as the number of seconds in a year or the number of miles equal to 50 kilometers.