Upgrade subject to access all content

Consider the following graph.

Marlena Morrison. Created for Albert.io. Copyright 2016. All rights reserved.

Select the statements that correctly describe the graph above. Select ALL that apply.

$y=\text{ sin }x $

$y=-\text{ sin } x$

$y=\text{ cos } x$

$y=-\text{ cos }x $

The amplitude of the graph is $1$.

The amplitude of the graph is $2$.

The period of the graph is $π$.

The period of the graph is $2π$.