Question

Medal.. :)
Select the equations that are parallel and perpendicular to y = one over fourx + 7 and that pass through the point (-8, 9).

parallel: y = one over fourx - 11
perpendicular: y = -4x + 23
parallel: y = -4x + 11
perpendicular: y = one over fourx - 4
parallel: y = 4x - 7
perpendicular: y = negative one over fourx - 7
parallel: y = one over fourx + 11
perpendicular: y = -4x - 23

Answer 1

Parallel line have same slope as of the given line.
Perpendicular line have negative reciprocal slope as of the given line

Answer 2

Umm OK so choice C??

Answer 3

@sangya21

Answer 4

Nope.
Your slope = 1/4
parallel slope = 1/4
perpendicular = -4

Answer 5

Choice B?!

Answer 6

No.

Answer 7

I don't get this at all

Answer 8

Lets do it this way.
standard formula of line => y =mx+c
We are given y =(1/4)x + 7
thus slope of the line (m) = 1/4
now we are given a point (-8,9)
we have to find the equation of line that is parallel and perpendicular to y =(1/4)x+7 and passes through (-8,9)

we will use point slope form
(y-y1) = m(x-x1)
(x1,y1) = (-8,9)
m(parallel)=1/4
m(perpendicular)=-4

so what will be the equation of line?

Answer 9

Um negative 1/4 -11

Answer 10

parallel or perpendicular?

Answer 11

point slope form
(y-y1) = m(x-x1)
(x1,y1) = (-8,9)
m(parallel)=1/4
m(perpendicular)=-4

Parallel line
y-9 = (1/4)(x-(-8))
y-9 =(1/4)x +2
y = 1/4x +11

Perpendicular
y - 9= -4 (x-(-8))
y -9 = -4x -32
y =-4x -23

Answer 12

My answer is D . thank you!

Answer 13

Anytime:)