A parabola opens upward or downward. The coefficient a in the quadratic equation determines the direction in which the parabola opens. If the coefficient is positive, it opens upward; if negative ...

This also gives the equation of the line of symmetry for the quadratic graph. The value of \(y\) when \(x = 3\) is -5. This value is always the same as the constant term in the completed square ...

This also gives the equation of the line of symmetry for the quadratic graph. The value of \(y\) when \(x = 3\) is -5. This value is always the same as the constant term in the completed square ...