Appendix D - Graphing Techniques - Exercises - Page 447: 11e

Graph "F" is the correct sketching.

For $y=2x^2,$ when $x=0, y=0$ and $x=1, y=2$ The curve passes through $(0,0)$ and $(1,2)$ Since the graph of $y=2x^2$ is vertical stretched twice of the graph of $y=x^2$, graph "F" is the correct sketching.