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Find the equation of the axis of symmetry for the parabola $y = x^2 - 4x$ . $\newline$ Simplify any numbers and write them as proper fractions, improper fractions, or integers. $\newline$ $\_\_\_\_\_$

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Characteristics of quadratic functions: equations

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Q. Find the equation of the axis of symmetry for the parabola

y = x^2 - 4x

.

\newline

Simplify any numbers and write them as proper fractions, improper fractions, or integers.

\newline

\_\_\_\_\_

Identify Coefficients: Identify the coefficients of the quadratic equation. $\newline$ The given parabola is in the form $y = ax^2 + bx + c$ . For the equation $y = x^2 − 4x$ , we can compare it to the standard form and identify the coefficients as follows: $\newline$ $a = 1$ (coefficient of $x^2$ ) $\newline$ $b = -4$ (coefficient of $x$ ) $\newline$ $c$ is not needed for finding the axis of symmetry.
Use Axis of Symmetry Formula: Use the formula for the axis of symmetry. $\newline$ The axis of symmetry for a parabola in the form $y = ax^2 + bx + c$ is given by the formula $x = -\frac{b}{2a}$ . We will substitute the values of $a$ and $b$ into this formula to find the axis of symmetry.
Substitute Values: Substitute the values of $a$ and $b$ into the formula. $\newline$ Using the values from Step $1$ , we have: $\newline$ $a = 1$ $\newline$ $b = -4$ $\newline$ Now, substitute these into the formula: $\newline$ $x = -(-4)/(2\cdot1)$
Simplify Expression: Simplify the expression to find the axis of symmetry. $\newline$ $x = \frac{4}{2 \cdot 1}$ $\newline$ $x = \frac{4}{2}$ $\newline$ $x = 2$ $\newline$ The axis of symmetry is therefore the line $x = 2$ .

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