Transformations
Transformations
Effects of "a"
When the a-value is greater than one, the parabola becomes narrower. When the a-value is less than one, the parabola becomes wider. When the a-value is positive, the parabola will open upward; when it is negative the parabola will open downward.
Example The graph below represents the function
in blue and
in red. Since both a -values are positive, the parabolas open up. Since 5 > 2, the blue parabola will be narrower than the red parabola.
![Effects1-3 Effects1-3](https://claregladwinresd.glk12.org/pluginfile.php/2175/mod_book/chapter/4586/Quadratic/Effects1-3.png)
Example The graph below represents the function
![Effects1-1 Effects1-1](https://claregladwinresd.glk12.org/pluginfile.php/2175/mod_book/chapter/4586/Quadratic/Effects1-1.png)
![Effects1-2 Effects1-2](https://claregladwinresd.glk12.org/pluginfile.php/2175/mod_book/chapter/4586/Quadratic/Effects1-2.png)
![Effects1-3 Effects1-3](https://claregladwinresd.glk12.org/pluginfile.php/2175/mod_book/chapter/4586/Quadratic/Effects1-3.png)