Question

Write the slope-intercept (y = mx + b) form of the equation from the information given.
The line goes through the points (-1, -7) and (-8, -2)
Slope = y2 - y1 =-1 - (-2)
x2 - x1 -7 - (-8)
= 2/1

@AbdullahM this is all I could figure out

Answer 1

hows it going need some help?

Answer 2

yes sir/ma'am I don't know how to finish this problem

Answer 3

Im A SIR!!! >_< lol dont worry, lets work out the problem... so i see you've tried to find the slope.. :)

Answer 4

yes sir... but I don't know how to get the equation

Answer 5

thats alright the only thing is... you got the slope wrong..

Answer 6

oh... what would it have been? 2/2?

Answer 7

no so if we plug in the numbers we get,
-2-(-7)/-8-(-1)
correct?

Answer 8

@abbycross167

Answer 9

Yes sir

Answer 10

would it be 5/-7?

Answer 11

correct :) so then we now have the slope

Answer 12

really? Awesome!

Answer 13

yes so now we find the y-intercept....

Answer 14

How would I do that?

Answer 15

we plug in our point (x,y), and solve for b.

y=mx+b
y=-5/7x+b

Answer 16

So y=-5/7x+b would be the equation

Answer 17

yes, so we plug in one point, and solve for b. give it a try :)

Answer 18

ok wait... I'm confused (I'm sorry I'm not good at math) would y=-5/7x+b be the equation or I have to solve for b in order to get the equation?

Answer 19

its fine im not rushing, math isnt easy for everyone but you need b to get the equation your looking for,, sorry that was my bad haha

Answer 20

Hi :)

Answer 21

@abbycross167 y2 - y1 would be -7 - (-2) = -7 + 2 = -5

x2 - x1 = -1 - (-8) = -1 + 8 = 7

So the slope is -5/7

Answer 22

Howdy... I really don't know what b would be

Answer 23

Now we plug in a point

y = -5/7x + b

-7 = -5/7 ( -1) + b

Solve for b :)

Answer 24

hows it going?@AbdullahM

its fine, so of we plug in our point, we get -7=-5/7(-1)+b or b=-7-5/7(-1)

Answer 25

ahh you beat me to it lol

Answer 26

would b be 5/7?

Answer 27

haha i would actually use a calculator for this, not gonna lie, but i got, -54/7

Answer 28

@AbdullahM what did you get for b?

Answer 29

Would y=-5/7x+(-54/7) be the equation?

Answer 30

yes that would be your final equation

Answer 31

oh ok, thank you kindly... would you mind helping me with one more?

Answer 32

no problem.. sure ill give it a shot :)

Answer 33

Ok, would you like me to do a new post?

Answer 34

nah, here's fine

Answer 35

Good job! That's correct :)