SOLUTION: find the quadratic function whose vertex is (-1,5) and passing through the point (2,7) and graph the function. need answer before 12/1/08
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-> SOLUTION: find the quadratic function whose vertex is (-1,5) and passing through the point (2,7) and graph the function. need answer before 12/1/08
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Question 170244
:
find the quadratic function whose vertex is (-1,5) and passing through the point (2,7) and graph the function.
need answer before 12/1/08
Answer by
scott8148(6628)
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using the vertex form of the equation __ y=a(x+1)^2+5
substituting the point to find a __ 7=a(2+1)^2+5
subtracting 5 __ 2=9a
dividing by 9 __ 2/9=a
y=(2/9)(x+1)^2+5 __ y=(2/9)x^2+(4/9)x+(47/9)