Question

Select the equations that are parallel and perpendicular to y = 2x - 1 and that pass through the point (4, 1).

parallel: y = 2x - 7
perpendicular: y = -1/2x + 3

parallel: y = 2x + 2
perpendicular: y = -1/2x + four and one half

parallel: y = -1/2x - 7
perpendicular: y = 2x + 3

parallel: y = -2x - 7
perpendicular: y = -1/2x - 1

Answer 1

ok...
parallel means same slope: slope = 2
perpendicular means negative reciprocal: slope = -1/2

you can eliminate the last two and test out the point (4, 1) into both choices...

Answer 2

so you know its going to be slope of -1/2 so now just plug in those points, because its linear only one will work

Answer 3

Plug what into points?

Answer 4

so take the two with the slope -1/2 and plug in x = 4 and y = 1 only one will make since

Answer 5

both equations must pass through (4, 1) so you'll have to test that in both.

Answer 6

yeah the set that is

Answer 7

One second let me work this out.

Answer 8

I think I read this wrong, but it should still work.

Answer 9

First one?

Answer 10

yes...:)

Answer 11

yep:)

Answer 12

Yay. Thank you guys (:

Answer 13

yw..:)

Answer 14

ok so I did read it wrong but the only thing I would add is, we know its going to be two with -1/2 as slope and 2 as slope

Answer 15

sorry dpalnc I didnt see what you said:)