The relationship between the two graphs can be described as y = (r - 3)° being translated 3 units down from y = r.
The relationship between the two equations can be determined by comparing them to the equation y = mx + b, where m represents the slope and b represents the y-intercept.
In this case, the equation y - r can be compared to y = mx + b, where the slope is -1 and there is no y-intercept.
The equation y - (r - 3)° can be compared to y = mx + b, where the slope is -1 and the y-intercept is -3.
Therefore, the correct sentence that describes the relationship between the two graphs is b) y = (r - 3)° is translated 3 units down from y = r.