Question

Write the equation of the line, in point-slope form and slope-intercept form, that contains the points (-2, -1 ) and (2, 1 ).

Answer 1

It's called the slope formula because you are solving for the slope

Answer 2

actually its y1-y2

Answer 3

Slope formula is m=\(\Large \frac {y_2-y_1}{x_2-x_1}\)

Answer 4

Apply the giving to points there for the slope :)

Answer 5

ok ok and ok

Answer 6

after solving for the slope apply to the point slope formula plus one of the giving points \(y-y_1=m(x-x_1)\)

Answer 7

WHOAH WHOAH WHOAH

Answer 8

WHAT HAPPENED TO Y2??

Answer 9

What happened to y2, what do you mean? It's p[art of the slope formula for you to apply the given y value there.

Answer 10

part*

Answer 11

oh i got confused cuz you only said y-y1

Answer 12

for the point slope, the x1,y1 means that you are plugging in values to those points, set aside x,y

Answer 13

Do the first step. Can you solve for the slope with using the formula i given to you? :)

Answer 14

"gave to you" sorry had to correct you there

Answer 15

Wait im still confused whats X and Y in the second part?

Answer 16

You are given the points (-2, -1 ) and (2, 1 )
\(slope=\Large\frac{y_2-y_1}{x_2-x_1}\)
Let's say
\((x_1,y_1)\)= (-2, -1 ) is the first point
\((x_2,y_2)\)=(2,1) is the second point

Plug those in

\(slope=\Large\frac{(1)-(-1)}{2-(-2)}\)=?

Answer 17

both the negatives would become positives and the minus would become a plus then you add them together and it turns into 2/4

Answer 18

btw how you do the line thing for 1-(-1)/2-(-2)

Answer 19

yes, and if you reduced the fraction by the divisions of 2
\(\Large \frac{2\div2}{4\div2}\)=\(\Large \frac{1}{2}\)

The slope is 1/2

Now, we have the point slope formula.
y-y1=m(x-x1)
Plug 1/2 for m and I will choose this point (2, 1 ) as for x1,y1. Again, It doesn't matter what point to use.

Answer 20

so what is x? we know x1 is 2 so is x -2?

Answer 21

x1,y1 is not the same as x1,y1 we used for the slope formula
But anyways, x1,y1 is (2, 1 ) therefore x1 is 2 and y1 is 1

Answer 22

i chose any point slope i wanted for x1,y1 in the y-y1=m(x-x1) formula. I chose (2,1)

Answer 23

look man im not talking about what is x1 im talking about what is the regular X in the equation y-y1=m(x-x1)

Answer 24

The regular x and the regular y, those what determine a graph to become a function meaning set of rules.
y=mx+b
m and b are numbers, y and x, is any number that is plugged for x determines y. Makes sense?
Example. This equation y=2x+6
see where y and x don't have numbers?

Answer 25

ohhhhhh ok!!!

Answer 26

look i can work it out later can you tell me what this is?

Answer 27

So, back to your question. Have you plugged the numbers yet?
m=1/2
(x1,y1)=(2,1) or if you want (-2,-1)

Answer 28

You mean, to tell you the answer?

Answer 29

i remember how to do it now but its gettin late and i really need this plz!!

Answer 30

I'm sure you can do it Diamond!! =D

Answer 31

come one man

Answer 32

come on*

Answer 33

plz

Answer 34

Come on diamond, i know you can. You are almost near to solving the question. All you have to do is plug and solve for y and you are done! :D

Answer 35

so 1/2+2x=y?

Answer 36

If i tell you the answer, that means my goal in tutoring you is gone for nothing :(
My goal was to walk you through.

Answer 37

Here, i plugged it for you. Can you now distribute and solve for y?