The equation in slope-intercept form is:
y = -x + 3
Explanation:An equation of a straight line in slope-intercept form is:
y = mx + b ..............................................(1)
where m is the slope and b is the y-intercept.
Given
x + y = 3
We can rewrite this as:
y = -x + 3 .............................................(2)
Comparing (2) with (1), we see that:
m = -1 and b = 3
The graph of this equation is shown below:
