For the first one it's D. and the second one is D. as well
A line perpendicular to the given line would have an opposite signed reciprocal slope. Since the slope of the given line is -1, then the perpendicular lines slope is 1.
Find b using y = mx + b or y - mx = b
-2 - 1(-2) = b
0 = b
The answer is y = x + 0 or y = x
B. If you Have the child's ticket being less than the adult's ticket, you can only add to get your answer.