You need to understand the base sine graph, and how to do basic transformations.
The graph of sinx will have its y-intercept at x = 0. It has an amplitude of 1, so it will always have a maximum of y= 1 and a minimum of y = -1. It first goes up, and then comes back down to reach a minimum, passing through the line y= 0, which is in fact the axis of symmetry.
The period of sine is 2pi, that's to say it takes 2pi units for it to repeat itself.
As for y = 1 + sinx, this is the graph of y = sinx, with the axis of symmetry moved up 1 unit to y = 1. The graph of y = 1 + sinx is shown in the following image.
![enter image source here]()
Hopefully this helps!
