To help with this problem, you can use the formula for translating a function vertically up or down. The formula is:

f(x) ± a

Where "a" represents the vertical shift up or down.

In this case, the function is y = sin(x) - 1. This means that the original sine function has been shifted downwards by 1 unit. So the graph will be the same as the sine function, but all values of y will be decreased by 1.

To graph y = sin(x) - 1, start by graphing the original sine function. Then, shift all points down by 1 unit.

If you need further assistance, let me know!