Can you please help me with this

label Algebra
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Do a-c for each quadratic function. A.find y-intercept, equation of axis of symmetry, the x-coordinates of the vertex B.make a table of values including the vertex C. Use information to graph function 1.f (x) = -3x^2+8x 2. f (x) 2x^2+7x+1
May 20th, 2015

1.f (x) = -3x^2+8x

y-intercept: x=0, then  f(x)=-3*0+8*0=0, so (0,0)

axis of symmetry: x = -b/2a = -8/2*(-3) = 4/3

The x-coordinate of the vertex is the equation of the axis of symmetry of the parabola.

x-coordinates of the vertex: x=4/3

x 0 1 4/3 2

y 0 5 16/3 4

1.png 

2. f(x)=2x^2+7x+1

y-intercept: x=0, then  f(x)=2*0+7*0+1=1, so (0, 1)

axis of symmetry: x = -b/2a =-7/2*2=-7/4

The x-coordinate of the vertex is the equation of the axis of symmetry of the parabola.

x-coordinates of the vertex: x=-7/4

x -2 -7/4   -1 0 1

y -5 -41/8 -4 1 10

2.png 



May 20th, 2015

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May 20th, 2015
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May 20th, 2015
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