Wednesday, August 28, 2013

Domain, Range, and Graphing Functions Review

Today we looked at a few examples involving functions, equations of lines, and graphing on a coordinate plane. Remember that functions have input and output, so therefore, they must contain at LEAST two variables. Two variables mean that we can graph them on two axes (x axis and the y axis).

We can easily graph equations in slope-intercept form, which uses the equation y = mx + b. m is your slope, and b is your y-intercept. To graph, we start at the y-intercept and we go up/down and over depending on what our slope is. Recall that slope is "rise over run," so make sure to look at your y-value (in the numerator) first and your x-value (in the denominator) second.

Shout out to TJ Davis for getting really excited about graphing things on sticky graph paper, and shout out to everyone sitting near him for putting up with the excitement. Shout out to Kelsey Hodges for extreme focus and perseverance throughout today - nice work!

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