X- 7y = 10 and 2x +14y = 21 are they perpendicular, parallel, or neither

X - 7y = 10
-7y = -x + 10
y = 1/7x - 10/7slope here is 1/7, y int = -10/7

2x + 4y = 21
4y = -2x + 21
y = -1/2x + 21/4...slope is -1/2, y int = 21/4

neither <==

for them to be parallel, they would need the same slope
for them to be perpendicular, they would need negative reciprocal slopes
they have neither

C. Undefined

Step-by-step explanation:

Any vertical line is going to have an undefined slope. Plug in any two points from that line, and the formula will give you an undefined number.

Hope this helps!