Question

Choose the equation of the horizontal line that passes through the point (-5, 1).

y = -5

x = 1

y = 1

x = -5

Answer 1

Hi ahmadnehela :)

How are you?

i think you should go with y=1

Answer 2

y=-5

Answer 3

elly394

Can you elaborate?

Answer 4

ok now im confused lol

Answer 5

Never mind it is y=1 :)

Answer 6

I mixed up x and y

Answer 7

Because in question they are asking for horizontal line passing through the point (-5,1)

Answer 8

ok can u guys help with one more question

Answer 9

I am 100% sure that y=-5 and x=1 are not the answers.

Answer 10

yes, Sure...

Answer 11

sure

Answer 12

Choose the equation below that represents the line passing through the point (-3, -1) with a slope of 4.

y - 1 = 4(x - 3)

y + 1 = 4(x + 3)

y - 3 = 4(x + 1)

y + 3 = 4(x - 1)

Answer 13

it is

y+1 = 4(x+3)

Answer 14

I agree

Answer 15

horizontal lines ALWAYS have the form y=[some number]... it doesn't contain the variable x because the slope is zero.

Answer 16

thanks but how about this Choose the equation of the line passing through the point (-4, -2) and perpendicular to y = -x + 6.

y = -x + 6

y = x - 6

y = -x - 2

y = x + 2

Answer 17

so wait the answer is wrong

Answer 18

which?

Answer 19

oh... then you should've made a new question post to avoid the confusion... especially on my part..:)

Answer 20

oh sorry but can anyone help with the new question

Answer 21

OK. It should be y=x-6

Answer 22

thanks

Answer 23

Aren't none of them perpendicular? Because the slope should be the negative reciprocal of the original slope, or 1/x, right?

Answer 24

for perpendicular lines,
the product of slopes of two lines = -1

Answer 25

I forgot that the value of x here was 1 so that would work

Answer 26

I was treating x as an unknown slope basically

Answer 27

let the given slope say m1=-1 (in question's equation)
and the slope to find is m2=? (in answer's equation)

m1*m2=-1
(-1)*m2=-1
m2=1

Answer 28

So slope of the required line should be +1

Now look at the choices which choices have positive slopes?

Answer 29

Right but I was being stupid and thinking that -x was the slope, instead of -1. If -x was the slope, then the slope of the perpendicular line would be the negative reciprocal, or 1/x so that the product was equal to -1. It was just a silly mistake :)

Answer 30

yes dear..