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Re: IA #36
Posted:
Jun 18, 2008 9:36 AM
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Regardless of what a text says, we should be following the NYS
glossary. Here is how the state wants us to define a root, as copied
from the HS glossary:
root of an equation (A) (A2T) A solution to an equation of the
form f(x) = 0.
Example: A root of the equation y = 6x ? 18 is 3 because when 3 is
substituted in for x, the value of y = 0.
Example: The roots of are and. The equation is true if we
substitute either or into the equation
Joe Mahoney
Teacher of Mathematics
Putnam Valley HS
Putnam Valley, NY 10579
845.526.7847
http://www.os4e.com/pvcsd/pvhs/jmahoney
On Jun 18, 2008, at 8:04 AM, DJV wrote:
> Using various sources, the definition of root includes "the POINTS
> where the graph of the equation crosses the x-axis" and "the roots
> are the the x-intercepts." Considering the fact that the students
> were using a graph (not solving algebraically) they should be
> receiving credit for listing the roots as points per the definition!
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