Graph the quadratic function below. \( y=2 x^{2}-4 x+4 \)
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To graph the quadratic function \( y = 2x^2 - 4x + 4 \), first, identify the vertex by using the formula \( x = -\frac{b}{2a} \). Here, \( a = 2 \) and \( b = -4 \). Plugging these values in gives \( x = \frac{4}{4} = 1 \). Now substitute \( x = 1 \) into the equation to find the \( y \)-coordinate of the vertex: \( y = 2(1)^2 - 4(1) + 4 = 2 - 4 + 4 = 2 \). So, the vertex is at (1, 2). Now, for a smooth curve, calculate additional points a little distance away from the vertex. Choose \( x = 0, 2, 3 \), calculate \( y \) values for those \( x \) values: \( y(0) = 4, y(2) = 4, y(3) = 8 \). Plot these points (0, 4), (1, 2), (2, 4), (3, 8) and draw a parabola opening upwards since the coefficient of \( x^2 \) is positive. Enjoy the curve!