Answer:
Given function:

To graph the line using inputs -1,0,1 and 2.
Solution:
In order to find the points to be plot on graph we will plugin the input values as
in the given function.
1) When




Point (-1,4)
2) When




Point (0,3)
3) When




Point (1,2)
4) When




Point (2,1)
The points to be plot in the graph are:
(-1,4),(0,3),(1,2),(2,1)