Which of the following is the graph of y= - x + 1

See picture below

Step-by-step explanation:

To graph properly, remember that:

The y intercept of the function, is the value of the function when x=0, and tells (in this case y=1 is the intercept). Locate this point in the graph.The x intercept, which is the value of x when y=0 is x=1. Locate it in the graph.You now have two points of a straight line: join this two points and you would have done it!