Question

What would be an equation in y - intercept form be for points:
(4,3) and (7, -2) graphed

Answer 1

those points are graphed and I have the slope; which is - 5/3

Answer 2

In order to find the slope: y2 - y1 divided by x2 - x1

Answer 3

When you have slope, plug m = -5/3 and any point coordinate into Point slope form

Answer 4

how would it work out then

Answer 5

Do you know Point-Slope form?

Answer 6

I don't think show me

Answer 7

y - y1 = m ( x - x1)

Answer 8

How would it work in an example or problem working on now

Answer 9

Choose the point (4, 3) then plug its value, also slope into the formula

Answer 10

Show me how's it's plugged in

Answer 11

@Chlorophyll it's too confusing

Answer 12

Why don't you plug m and x1 in?

Answer 13

is there another way of doing it

Answer 14

NO, there's only 1 and 1 way!
Believe me if there's another easier way I already showed you!

Answer 15

If you can't follow my instruction, I'll give up with whatever your posts later !

Answer 16

I have a graphing calculator and is trying to figure out in the table what equation goes with (4,3) and (7,-2) and I already have y = - 5/3x ........

Answer 17

Why would you rather to keep complaining "confused" in stead of plug the numbers in???

Answer 18

I'll return one more time to check it!

Answer 19

see I have y - 3 = - 5/3x ...... should I distrubute

Answer 20

before that I had y -3 = - 5/3 x - (4) <---- what do I do here

Answer 21

okay it's the same

Answer 22

I got - 20/3

Answer 23

I am probably wrong, but all I want is the answer that's all the teacher cares

Answer 24

plus a little work shown

Answer 25

that's what I got when I distributed

Answer 26

y = - 5/3x - 20/3

Answer 27

0 idk, making me figure this out isn't helping me

Answer 28

okay

Answer 29

you're smarter then me

Answer 30

It would be nice to tell me the answer if I have 1/2 of it: y = -5/3 x + ?

Answer 31

Is it 5, 4, or something. Well post it on here. Me logging off

Answer 32

I don't know if you still need help, but I can try to explain it.
(y-y1)=m(x-x1) is the point slope form where m is the slope of the line
y1 is the y coordinate of a point on that line and x1 is the x coordinate of the same point
you just plug in the numbers and solve for y as chlorophyll did above
this form is very useful when you only have two points to find an equation

Answer 33

Guys here's the point slope m = \[\left[\begin{matrix} y2 - y1 \\ x2 - x2\end{matrix}\right]\]

Answer 34

It's in a fraction meaning dividing

Answer 35

I don't need it, because @Chlorophyll WAS CONFUSING ME

Answer 36

Okie, so let start from the beginning :)