Question

Perpendicular lines, picture below.

Answer 1

second answer choice

Explanation:

if you calclulate the slope using rise over run you will se that is the right equation

Answer 2

`\sf (b)/(a) = (c)/(d)`

Explanation:

The slope of left straight line is:

`\sf m1 =(Rise)/(Run)=(b)/(-a)=-(b)/(a)`

The slope of right straight line is:

`\sf m2=(Rise)/(Run)=(-c)/(d)=-(c)/(d)`

We can conclude that if the slope of two straight line is same or equal, than the lines are parallel.

So,

m1 = m2

`\sf -(b)/(a) = -(c)/(d)`

While simplifying this, we get

`\sf (b)/(a) = (c)/(d)`

Therefore,

Option 2nd is the answer:

`\sf (b)/(a) = (c)/(d)`