Mathematics 9709 · AS & A Level · Functions

Functions — practice question

(a)[2]

Rewrite $2x^2 - 8x + 14$ in the form $2[(x - a)^2 + b]$.

(b)[4]

The functions $f$ and $g$ are given by $f(x) = x^2$ for $x \in \mathbb{R}$ and $g(x) = 2x^2 - 8x + 14$ for $x \in \mathbb{R}$. Describe fully a sequence of transformations that carries the graph of $y = f(x)$ onto the graph of $y = g(x)$, and state clearly the order in which those transformations occur.

Worked solution & mark scheme

This 6-mark question has a full step-by-step worked solution and mark scheme. One marking point: Completed square written correctly as $2[(x-2)^{2}+3]$

  • Full mark scheme, point by point
  • Step-by-step worked solution
  • Write your answer & get it marked instantly by AI