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The axis of symmetry formula uses the standard form of the quadratic equation as well as the vertex form. The symmetry cuts any geometric shape into two equal halves. The axis of symmetry formula is given as, for a quadratic equation with standard form as y = ax 2 + bx + c, is: x = -b/2a.
There are two different formulas that you can use to find the axis of symmetry. One formula works when the parabola's equation is in vertex form and the other works when the parabola's equation is in standard form .
Equation of the axis of symmetry. Let *f (x)=ax^2+bx+c* be the quadratic function, the axis of symmetry of the graph of this function has the equation: *x=\dfrac {-b} {2a}*. This expression becomes familiar after working with the vertex, as it is the x -coordinate of the same.
3 sie 2023 · Equation of axis of symmetry is, x = h, here (h, k) = vertex of the parabola. We obtain the vertex of the function (x, y) by substituting the value of x in the standard form of the equation and get the value of y.
The equations of parabolas with vertex \((0,0)\) are \(y^2=4px\) when the x-axis is the axis of symmetry and \(x^2=4py\) when the y-axis is the axis of symmetry. These standard forms are given below, along with their general graphs and key features.
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The axis of symmetry is the vertical line x = −3. The table in Figure \(\PageIndex{1}\)(b) calculates two points to the right of the axis of symmetry, and mirror points on the left of the axis of symmetry make for an accurate plot of the parabola.
