The slope of the graph will equal ZERO at the vertex, so if you know how to DIFFERENTIATE it you can set dx/dy = 0 to find the vertex value of 'x' ...then you plug that value of 'x' back into the ORIGINAL equation to get the 'y' value of the vertex....
ANOTHER way is to use the graphing function of the web2.0 calc and LOOK at the graph.....
+128517 This should help........http://www.purplemath.com/modules/parabola.htm
+118609 The x value of the roots is -b/2a
You can plug the value of this into the formula to get the corresponding y value :)
The slope of the graph will equal ZERO at the vertex, so if you know how to DIFFERENTIATE it you can set dx/dy = 0 to find the vertex value of 'x' ...then you plug that value of 'x' back into the ORIGINAL equation to get the 'y' value of the vertex....
ANOTHER way is to use the graphing function of the web2.0 calc and LOOK at the graph.....
