The parabola

\[y=x^2\] is reflected across the
\[x\]-axis and then scaled vertically by a factor of

\[\dfrac{1}8\].
What is the equation of the new parabola?
\[y=\]

1 answer

To find the equation of the new parabola, we will first reflect the original parabola \(y = x^2\) across the \(x\)-axis, and then scale it vertically by a factor of \(\frac{1}{8}\).

  1. Reflecting across the \(x\)-axis: Reflecting the parabola \(y = x^2\) across the \(x\)-axis means changing the sign of \(y\): \[ y = -x^2 \]

  2. Scaling vertically by a factor of \(\frac{1}{8}\): To scale the parabola vertically, we multiply the entire equation by \(\frac{1}{8}\): \[ y = \frac{1}{8}(-x^2) = -\frac{1}{8}x^2 \]

Thus, the equation of the new parabola after reflecting across the \(x\)-axis and scaling by a factor of \(\frac{1}{8}\) is: \[ \boxed{y = -\frac{1}{8}x^2} \]