Question

**WILL MEDAL AND FAN!!!


What is an equation for the line that passes through points (-1,-4) and (1,4)? Write an equation in slope-intercept form.
** Please explain

Answer 1

@aum @Walkerman15 @satellite73 @Destinymasha @bibby

Answer 2

do you know how to find the slope of the line that passes through those 2 points?

Answer 3

No. @nikato

Answer 4

\[\frac{ y _{2}-y _{1} }{ x _{2}-x _{1} }= slope\]

Answer 5

and you're given two points
(x1,y1) and (x2,y2)

plug in your points and solve for slope

Answer 6

So -4 - 4 = -8
And -1 - 1 = -2
@nikato

Answer 7

Yes. And what's -8/-2 ?

Answer 8

-4.
So how would I write that problem out?

Answer 9

It's actually 4.
Negative number divided by negative=positive

So now you found that the slope is 4.

Do you know what the slope intercept form is?

Answer 10

No.

Answer 11

Well it looks like this

y=mx+b

Where m= slope
b= y-intercept
And you have a point on the line (x,y)

Answer 12

y= 4x-2?

Answer 13

And you know that m=4
And you could use either one of the points for (x,y)

Plug the numbers in and try to solve for b

Answer 14

B would be -2

Answer 15

No. B is not -2.

Answer 16

Wait I did this all wrong y2 is 4 and y1 is -4 it would be 8

Answer 17

Lets use (1,4)
So plug in to y=mx+b

4= (4)(1) +b
4=4+b
-4. -4
----------
0=b

Answer 18

Or if you used the other

-4= (4)(-1)+b
-4=-4+b
+4. +4
-----------
0=b

Answer 19

I did it wrong. It should be positive 8 and positive 2
and that equals 4

Answer 20

What?
I've already showed you. b=0
^^^^^

Answer 21

The y's equals 8 so that would be the y intercept.

Answer 22

So the answer is .....y = 4x+0

Answer 23

Yes. That is correct. But you could omit the +0
And just write y=4x, it's the same thing

Answer 24

How did you get 0 though?

Answer 25

Did you see above?

I've showed you step by step by plugging into either points but you only had to do one

Answer 26

Oh yeah. Can you help me with one more?

Answer 27

@nikato

Answer 28

So you get it now?

And yea, I can help you

Answer 29

Yes. Thank you.
Which lines are parallel if m<4 = m<5? Justify your answer. Please Explain**
https://www.connexus.com/content/media/336756-242011-55159-PM-1555594245.gif

Answer 30

Can you screen shot or something
It says I need to log in

Answer 31

Ok. What do you think?

Answer 32

Is it referring to the numbers or letters?

Answer 33

I don't get it 4 and 5 are on 2 different lines.

Answer 34

@nikato do you understand?

Answer 35

Sorry.
Was watching the baseball game.
Giants just won!

And the letters refer to the lines, but the numbers refer to the angle

Answer 36

Have you heard of the alternate interior theorem

Answer 37

Yes, but I don't know what it does.

Answer 38

So it would parallel to r and s?

Answer 39

Yes. That is right. r and s would be parallel

Answer 40

R and S would be parallel because of the alternate interior theorem? @nikato

Answer 41

Correct

Answer 42

Okay one more question please. @nikato

Answer 43

Find the values of x, y, z. The diagram is not to scale. I already found x. I need to find y and z. How?

Answer 44

Sorry was AFK.

So after you find x.

Solve 180-x to find z because x and z are supplementary which means they add up to 180.

And once you find z, remember all 3 angles of a triangle add up to 180. This should help you find y

Answer 45

z is 99? Right? @nikato

Answer 46

Correct

Answer 47

So z is 68?

Answer 48

Wow thank you so much!! You a lifesaver!!!! @nikato

Answer 49

Correct.

And no problem @ayyookyndall
Happy to help you. You're a quick learner