Most short-period comets do not have randomly oriented orbits because

1) line y equals negative 5 halves x minus 7
y=-5(x/2)-7 > 2y=-5x-14---> 5x+2y=-14

2) line y equals 7x minus 7    y=7x-7> 7x-y=7

3)They intersect at 0, negative 7
for x=0  5x+2y=-14>2y=-14-->y=-7ok
for x=0  7x-y=7>-y=7>y=-7ok

the answer is the B. 5x + 2y = −14  7x − y = 7