The quadratic function is
.
The above function compare with
.
Rewrite the function 
a =
, b = 4 and c = 6.
The y-intercept of the equation is c = 6.
\The equation of the axis symmetry is
.
(Substitute the values a =
and b = 4)
(Simplify)
The x-coordinate of the vertex is
.
The equation of the axis symmetry is
and x-coordinate of the vertex is
.
Make a table of values that includes the vertex.
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Graph of the quadratic function
is
Draw a coordinate plane.
\Plot the points.
\Draw a smooth curve through this points.
\=-0_75x%5E2+4x+6.gif\")
The y-intercept of the equation is c = 6. and The equation of the axis
\symmetry is
and x-coordinate of the vertex is
.
The graph of the quadratic function
is
=-0_75x%5E2+4x+6.gif\")