Question

Please help I Will fan and give medals Have multiple Questions!!!!!!! Need a smarty(:

Line AB contains points A (1, 2) and B (−2, 6). The slope of line AB is

zero

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positive

negative

Answer 1

Can you picture which one it is from the points?

Answer 2

Not sure @a1234

Answer 3

Connect the two points. What do you get?

Answer 4

@a1234 Would it be positive?

Answer 5

Good job! It's positive.

Answer 6

@a1234 Thank you very much for your help! anyway you could help me with a few more?

Answer 7

Yes, I can.

Answer 8

The equation of line AB is y = 2x + 4. Write an equation of a line parallel to line AB in slope-intercept form that contains point (3, −2).

y = 2x + 4

y = negative 1 over 2x − 1 over 2

y = − 1 over 2x − 7 over 2

y = 2x − 8

Answer 9

@a1234 Having trouble here I Got B as my answer....

Answer 10

Use y - y1 = m(x - x1).

You have y = 2x + 4 and the point (3, -2). Plug the values in accordingly.

y + 2 = 2(x - 3)

y + 2 = 2x - 6

y = 2x - 8

Answer 11

So having y = 2x - 8 as the answer???? @a1234

Answer 12

Yes.

Answer 13

@a1234 Thank you so much your awesome i have 2 more if you wouldnt mind......
The equation of line AB is (y−3) = 5 (x − 4). What is the slope of a line perpendicular to line AB?

−5

5

negative 1 over 5



The equation of line QR is y = negative 1 over 2x + 1. Write an equation of a line perpendicular to line QR in slope-intercept form that contains point (5, 6).

y = 2x + 16

y = negative 1 over 2x + 17 over 2

y = − 1 over 2x + 7 over 2

y = 2x − 4
1 over 5

Answer 14

The slopes of perpendicular lines equal -1. Expand (y−3) = 5 (x − 4).

y - 3 = 5x - 20

y = 5x - 17

The slope of this line is 5. So, if you need a product of -1, then the other slope must be -1/5.

y - y1 = m(x - x1)

y + 3 = -1/5(x - 4)

y + 3 = -1/5x + 4/5

y = -1.5x - 2.2

So, do you see what the slope is?

Answer 15

@a1234 The first question being -1/5?????? And the second one being?

Answer 16

@a1234 B?

Answer 17

The second one...you give it a try :). Why do you say B?

Answer 18

Wait... what exactly does negative 1 "over" mean?

Answer 19

@a1234 Im not understanding ...?

Answer 20

What does "-1 over 2x + 1" mean in the second problem? You try solving the problem this time.

Answer 21

@a1234 i told You what i thought was the answer...? Can you confirm the answer???

Answer 22

I don't even exactly know what the question means. How can I confirm the answer?

Answer 23

The equation of line QR is y = -1/2x + 1. Write an equation of a line perpendicular to line QR in slope-intercept form that contains point (5, 6).

y = 2x + 16

y = negative 1 over 2x + 17 over 2

y = − 1 over 2x + 7 over 2

y = 2x − 4

Answer 24

@a1234 Better??? sorry about that

Answer 25

y = negative 1 over 2x + 1

What does this mean?

Answer 26

QR is y = -1/2x + 1 @a1234

Answer 27

Aaah...much better :).

-1/2 times what number will equal -1?

Answer 28

@a1234 Yes hahhaha............ .......... Would it be postive 1/2?

Answer 29

No, -1/2 * 1/2 = -1/4

Answer 30

@a1234 Oh thetn im not sure

Answer 31

That number is just the opposite reciprocal, which is 2 in this case.

You have y = -1/2x + 1 and the point (5, 6). Use y - y1 = m(x - x1) and plug in the points like I did in the previous problem. What do you get?

Answer 32

@a1234 Is it y = 2x − 4??? If not im lost haha ):

Answer 33

y - 6 = 2(x - 5)

y - 6 = 2x - 10

y = 2x - 4

So, yes, y = 2x - 4 :).

Answer 34

@a1234 Thank you so much for all your help your amazing!!!!!!!!!!!!!!!!!!!1

Answer 35

You're welcome.