Question

help me plz

Answer 1

how do you find the Use point-slope form to write the equation of the line in standard form

with this points:(-5,2) (1/2,4)

Answer 2

@SolomonZelman

Answer 3

@AriPotta

Answer 4

@chosenmatt

Answer 5

can you help me @AriPotta

Answer 6

these are our points: (-5,2) and (1/2,4). use the slope formula to find the slope first\[\frac{ y _{2}-y _{1} }{ x _{2}-x _{1} }\]

Answer 7

sorry wrong answer

Answer 8

i don't now

Answer 9

well i got \[\frac{ 2 }{ 5.5 }\]

Answer 10

how did you find 2/5.5

Answer 11

\[\frac{ 4-2 }{ 0.5-(-5) }=~\frac{ 2 }{ 0.5+5 }=~\frac{ 2 }{ 5.5 }\]

Answer 12

but what happened to the 1/2

Answer 13

1/2 is the same as 0.5

Answer 14

so now that we know the slope, we're gonna use that and one of the points in point-slope form, which is y - y1 = m(x - x1), where m is the slope, y1 is the y part of the point, and x1 is the x part of the point

Answer 15

okay

Answer 16

so what do you get when you do that

Answer 17

i dont now plz help me

Answer 18

let's use (-5,2) as our point. this is point-slope form: y - y1 = m(x -1)

what should we plug in for y1?

Answer 19

5

Answer 20

coordinates are in the form of (x,y) so our y1 would be 2. so far we have

y - 2 = m(x - x1)

what should we plug in for m?

Answer 21

2/5.5

Answer 22

yes. so y - 2 = 2/5.5(x - x1)

what's the x1?

Answer 23

-5

Answer 24

yep. so our equation in point-slope form is y - 2 = 2/5.5(x + 5)

i gotta go real quick. i'll be back in like 5 min

Answer 25

when i get back, we'll start putting the equation in standard form

Answer 26

okay

Answer 27

alrighty. so standard form is Ax + By = C where A can't be a fraction or a negative

Answer 28

what's our first step?

Answer 29

what do you mean

Answer 30

ok so basically we want to get x and y on the left side of the equation

Answer 31

first, we have to distribute the 2/5.5

Answer 32

do you know how to distribute?

Answer 33

wait

Answer 34

2/5.5x+1.81

Answer 35

yea so now we have y - 2 = 2/5.5x + 1.81. what should we do now?

Answer 36

isolate variables to one side?

Answer 37

yes

Answer 38

how do i do that?

Answer 39

subtract 2/5.5 from both sides

Answer 40

2/5.5x*

Answer 41

wouldn't that lead me to a negative number?

Answer 42

yes

Answer 43

-2.36

Answer 44

y - 2 = 2/5.5x + 1.81

once you subtract 2/5.5x from both sides, you get

-2/5.5x + y - 2 = 1.81

now we wanna get rid of the -2, so add 2 to both sides

Answer 45

ok