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mr_homm
Member since May2205

Apr2606, 08:46 AM (EST) 

1. "RE: How to solve a Parabola graphically"
In response to message #0

Hi Jasmine, >I don't understand how to solve parabola question >grapahically. Can you please help me? What exactly are you trying to do with the parabola? There are lots of different questions you could ask about parabolas, so I need to know which one you are tryng to answer. I'm sure someone here can help you with it, but we need to know exactly what the question is. Stuart Anderson 

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PLE
guest

Apr2806, 09:23 AM (EST) 

2. "RE: How to solve a Parabola graphically"
In response to message #0

To solve a parabola graphically, simply look for the AOS which is x=b/2a. The x value found using the AOS is the x value for the vertex of the parabola. Now plug this x value into the intial equation which should be set = y. After solving you will have the y value of the Vertex. Now draw a Tchart and put the vertex values in the center of the T chart. Choose other values on each side of the x value found as the vertex and solve y. Now plot the graph. Where ever the parabola crosses the xaxis is the solution to the Quadratic Equation.Remember when solving Quadratic Equations you are looking for all values that would make y=0 therefore that would be any point of the parabola that crosses the xaxis because y=0 along the xaxis. I hope this helped 

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stapel
Member since Mar502

May0806, 01:27 PM (EST) 

3. "RE: How to solve a Parabola graphically"
In response to message #0

>I don't understand how to solve parabola question >grapahically. Can you please help me? To "solve" a quadratic, you find the zeroes. The zeroes are also the xintercepts (assuming the zeroes are real; that is, that the stuff inside the square root in the Quadratic Formula isn't negative). So "solving" "graphically" means "draw the picture and guess the xintercepts from the drawing". It isn't the best method for accuracy (what if the xintercept is at, say, (2/3)sqrt(7)?), but it can be sortof useful in reinforcing the relationship between "(real) solutions" and "crossing the xaxis". So draw the picture, and guess the xintercepts from that. (Then check your work  and fudge the drawing, if necessary  with the Quadratic Formula.) Eliz.


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