Answer:
See graph
Explanation:
y = -x + 3 is an equation written in slope-intercept form y = mx + b
In this form, m is the slope (rate of change) and b is the y-intercept (where the line crosses the y (vertical) axis.
In this equation, m is -1 and b is 3.
The line moves at a at a rate of one unit and right one unit. (think down one, over one, down one over one...)
... and it crosses the y-axis at 3.