SOLUTION: Identify the axis of symmetry, create a suitable table of values and sketch the graph(including axis of symmetry). Y=x^2-5x+3 I would appreciate any help on this.

Algebra ->  Quadratic Equations and Parabolas  -> Quadratic Equation Customizable Word Problems -> SOLUTION: Identify the axis of symmetry, create a suitable table of values and sketch the graph(including axis of symmetry). Y=x^2-5x+3 I would appreciate any help on this.       Log On


   



Question 108823: Identify the axis of symmetry, create a suitable table of values and sketch the graph(including axis of symmetry). Y=x^2-5x+3

I would appreciate any help on this.

Found 2 solutions by stanbon, MathLover1:
Answer by stanbon(75887) About Me  (Show Source):
You can put this solution on YOUR website!
Identify the axis of symmetry, create a suitable table of values and sketch the graph(including axis of symmetry).
Y=x^2-5x+3
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x^2-5x+3 = y
Complete the square on the x-terms and keep the equation balanced:
x^2-5x+(5/2)^2 = y-3 + (5/2)^2
Factor to get:
(x-(5/2))^2 = y+13/4
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Axis of symmetry: x = 5/2
Sketch as a vertical line passing thru all point where x = 5/2
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graph:
graph%28400%2C300%2C-10%2C10%2C-10%2C10%2Cx%5E2-5x%2B3%29
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Table: Y=x^2-5x+3
If x= 1 y=1-5+3 = -1
If x=2 y = 4-10+3= -3
If x=3 y = 9-15+3 -3
If x=4 y = 16-20+3 = -1
================
Cheers,
Stan H.




Answer by MathLover1(20849) About Me  (Show Source):
You can put this solution on YOUR website!
y=x%5E2-5x%2B3
Since b+=+-5, -b will be 5
Then
Axis of symmetry: x+=+-b%2F2a …..=>……
Axis of Symmetry: x+=+5%2F2+=+2%281%2F2%29 ……or use decimal…x+=+2.5
This is one point through what the axis of symmetry passes. You need one more point to draw that line, and that point has to be a vertex. Substitute 5%2F2 for x in the y+=+x%5E2+-5x+%2B+3 and find y.
y+=+x%5E2+-5x+%2B+3
y+=+%282.5%29%5E2+-5%282.5%29+%2B+3
y+=+6.25+-+12.5+%2B+3
y+=-3.25
So, the vertex is: (2.5,-3.25)
The graph will be a curve called a parabola
Here is the table:
x | y
---------
0 | 3
1 |-1
2.5 |-3.25
3 |-3
4 |-1
5 | 3
6 | 9





Solved by pluggable solver: PLOT any graph
Graphing function x%5E2-5x%2B3:

graph%28+600%2C+600%2C+-7%2C+7%2C+-5%2C+5%2C+x%5E2-5x%2B3+%29