The graph of the functions y = x and y = -x + 4 is attached
Features of the graphs
The equation graphed is written in the slope intercept form s below
y = mx + c
where
m = slope
x = intercept
For, y = x
The slope is 1
the y intercept is 0
For, y = -x + 4
The slope is -1
The y intercept is 4