Question

Tell whether the lines for each pair of equations are parallel perpendicular or neither.
Y= -2x + 4
-5+10y=5
I think perpendicular

Next question is same kind-
Y=-1/4x+10
-2x+8y=6
I think it's neither

Answer 1

the first has a slope of -2, comparing it to y = mx+b

2nd:
I will assume you meant:
-5x + 10y = 5
10y = 5x + 5
y = (1/2)x + 1/2

so the slopes are 1/2 and -2,
well, now you can be 100% sure they are perpendicular

repeat for #2
remember , if the are parallel, the must have the same slope