Answer:
The answer is
90 degrees the first one is I don't know about the rest sorry
Step-by-step explanation:
<span>Perpendicular lines' slopes are reciprocals of one another. So we know the perpendicular line will have a slope of 1/2. Then we can use our points to find the rest.
8=1/2(1)+b
8=0.5+b
7.5=b
y=2x+b</span>
