Well, you probably want this equation in line form which is y = mx + b where m is the slope and b is the y-intercept (where the line runs into the y axis):
x + y = 2
y = -x + 2
↑ ↑
slope y-intercept
This line will look like y = x which is a positive line at a 45° angle and passes through the origin (0, 0). However, it is going to slope downward since the slope is negative, and the line is moved upward a bit to cross through the y axis at 2.
