Q. What is the range of this quadratic function?y=x2−4x+4Choices:(A)y∣y≥2(B)y∣y≤0(C)y∣y≥0(D)all real numbers
Identify Quadratic Function: Identify the general form of the quadratic function.The given function is y=x2−4x+4, which is in the standard form y=ax2+bx+c, where a=1, b=−4, and c=4.
Find Vertex X-coordinate: Find the x-coordinate of the vertex of the parabola.The x-coordinate of the vertex can be found using the formula x=−2ab. Substituting the values of a and b, we get:x=−2⋅1−4=24=2.
Find Vertex Y-coordinate: Find the y-coordinate of the vertex by substituting the x-coordinate back into the original equation.Substitute x=2 into y=x2−4x+4 to find the y-coordinate:y=(2)2−4(2)+4=4−8+4=0.
Determine Parabola Direction: Determine the direction in which the parabola opens.Since the coefficient of x2 (a=1) is positive, the parabola opens upwards.
Determine Range: Determine the range of the quadratic function.Given that the parabola opens upwards and the vertex is at (2,0), the lowest point on the parabola is at y=0. Therefore, the range of the function is all y-values greater than or equal to 0.
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