PreCalculus

/PreCalculus

Families of Graphs

One of the benefits of graphing calculators and graphing software is that it allows you to learn things about functions and equations that would have been tedious to explore via pencil and graph paper. Families of graphs is a concept that starts with a "parent" function or equation and asks you to compare "child" functions [...]

By | 2017-11-13T22:02:01+00:00 June 23rd, 2015|Algebra II, PreCalculus|0 Comments

Angular Velocity to Linear Velocity

It is one thing to read about a tire rotating at a specified number of revolutions per second. It is another to be able to visualize it. When you add lights to bike tires and film at dusk you slow things down enough to make sense of the question. How fast is the bicycle going? [...]

By | 2017-11-13T22:02:02+00:00 March 15th, 2015|PreCalculus|1 Comment

Just How Tall Was That Snowman?

You have to love people who make lemonade from lemons. A recent photo circulating in FaceBook made me envious, for just a fraction of a second, of the people in Boston who are dealing with the historic snow falls of the 2014-2015 winter. Snow Pit, South Boston, MA. 2015. Courtesy Bill McKay   The [...]

By | 2017-11-13T22:02:02+00:00 February 28th, 2015|Geometry, PreCalculus|1 Comment

How to Demonstrate Graphing Calculator Steps

Texas Instruments has dominated the graphing calculator market since the TI-81 debuted in 1990. Despite the fact that many free graphing calculator apps for smart phones and tablets are more than capable of performing the same tasks, the calculators stubbornly hold their market share. The advantage lies in the fact that many TI calculators are [...]

By | 2017-11-13T22:02:02+00:00 February 11th, 2015|Algebra II, Graphing Calculator, PreCalculus|0 Comments

Tidal Range

Low Tide Versus High Tide   These images show low tide and high tide on January 19, 2011 near the Golden Gate NOAA tide gauge in the San Francisco Bay. The question is, is this normal or is there cause for concern? Data from the tide gauge for this time frame is available from the [...]

By | 2017-11-13T22:02:03+00:00 January 25th, 2015|Algebra II, Graphing Calculator, PreCalculus|0 Comments

Graphing Absolute Value

https://www.youtube.com/watch?v=LXhADp-KPg8 When graphing the absolute value function, create a t-chart and list values for x. Then plug those values into the equation to find y. Be sure to treat the absolute value like a parenthesis and perform the order of operations using it as a grouping symbol. Anything within the absolute value is performed first. Once [...]

By | 2017-11-13T22:02:03+00:00 January 18th, 2015|Algebra, Algebra II, PreCalculus|0 Comments