Answer:
Fourth answer choice: y = x + 3
Step-by-step explanation:
Note that sides a and s are perpendicular to side r. Both sides a and s have positive slopes, so we can immediately eliminate answer choices 1 and 2.
If we extend side s up and to the left, it intersects the y-axis at (0, 3). Thus, the y-intercept is +3 and the desired equation is:
y = x + 3
