#### Posted February 26, 2012

#### by Lensyl Urbano

Here's a prototype for showing how the

*equation of a straight line* changes as you change its slope (

**m**) and intercept (

**b**):

It starts with an

**horizontal line** along the x-axis, where the slope is zero and the intercept is zero:

The line moves upward, but stays horizontal, until the intercept is 1.0:

The slope increases from horizontal (m = 0), gradually, until the slope is 0.5:

Finally, we move the line upwards again, without changing the slope (m = 0.5), until the intercept is equal to 4.0:

Now I just need to figure out how to make them interactive.

**Citing this post**: **Urbano**, L., 2012. Straight Lines, Retrieved September 23rd, 2017, from *Montessori Muddle*: http://MontessoriMuddle.org/ .

**Attribution (Curator's Code )**: Via: ᔥ Montessori Muddle; Hat tip: ↬ Montessori Muddle.

Posted in Algebra, Mathematics.

Tags: algebra, graphing, html5.

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