Question

Please help me! plz plz plz
Part 1: Write the equation of the line that passes through the points (–1, –4) and (2, 5).

Part 2: Using complete sentences, explain whether or not it matters which point is used in the final answer. Also explain why you chose the point you did.

Answer 1

where are you confused?

Answer 2

Part 1: y=3x-1. Part 2: It does not matter which point you choose to in the final answer as either point will result in the same answer. I chose the point (2,5) because it looked simpler at first glance.

Answer 3

@Sanguine.Brother ..???

Answer 4

Well, you are given two points. You can use those two points to find the slope of the line that passes between them using the equation (5-(-4))/(2-(-1)) which should give you 3. From there we know the equation will be y=3x+b and you just pick one of the points to plug in y and x in order to find b in the general equation.

Answer 5

are these questions related??

Answer 6

oh wait..it'syour answer lol

Answer 7

how did you get y = 3x - 1?

Answer 8

yeap am a little confused ;//

Answer 9

lol it's correct though..just wanted to know which formula :)

Answer 10

Sorry, let me try to explain a little more. So, to find the slope of the line that passes between those two points you need to subtract the first y-coordinate from the second y-coordinate (5-(-4)) and divide the answer you get (9) by the quotient resulting from subtracting the first x-coordinate from the second x-coordinate (2-(-1) which would be 3. So 9/3=3 (the slope of the line). With point-slope form we know that y=3x+b, with 3 being the slope we found and b being the y-intercept we need to find. To do this, we pick one of the points, either (-1,-4) or (2,5) and plug them into the equation and solve for b, which in this case will be -1.

Answer 11

this where I got stuck y-5=3x-2
y=3x-2+5
meabe I am using the wrong formula??

Answer 12

You are not necessarily using the wrong formula, but you are using a different one incorrectly. I used the slope-intercept form to get my answer while you are using point-slope form. To use point-slope form, the equation would be y-5=3(x-2). The slope is multiplying the difference between the x-coordinates.

Answer 13

the difference is that 3 gets distributed 3(x-2) = 3(x) + 3(-2)

Answer 14

so am good?? I distributed 3 and then
y-5=3x-2
y=3x-2+5
y=3x-7
that my final answer
is it right?

Answer 15

you did not distribute 3...look at what i said 3(x+2) = 3(x) + 3(-2)

what is 3(x)?

Answer 16

;;;(( now am confused! sorry ;(( don't kill me

Answer 17

confused where?

Answer 18

ok y-5=3(x-2) I distributed there so now I have y-5=3x-2 am I correct??

Answer 19

no... 3(x+2) is NOT equal to 3x - 2

Answer 20

just follow what im saying.. 3(x-2) = 3(x) + 3(-2)

what's 3(x)?

Answer 21

I have no idea o.O??

Answer 22

that is read as 3 times x what is 3 times x?

Answer 23

O.o??

Answer 24

2 times x is 2x
4 times x is 4x

so what's 3 times x?

Answer 25

3x

Answer 26

correct..

Answer 27

3(x-2) = 3(x) + 3(-2)

3(x) = 3x
3(-2) = ?

Answer 28

what is 3(-2)?

Answer 29

-6

Answer 30

so 3(x-2) is....?

Answer 31

3x-(-6) ??

Answer 32

no..it's 3x + (-6)

remember i wrote 3(x-2) = 3x + 3(-2)

Answer 33

simplify 3x + (-6)..

Answer 34

thats where I got stuck

Answer 35

isnt it
y-5=3x(-6) ?

Answer 36

I am super stuck in the deep of the bottom of the ocean!

Answer 37

2a + (-1) = 2a - 1
4b + (-2) = 4b - 2

so what 3x + (-6)?

Answer 38

3x-6 ?

Answer 39

yup

Answer 40

so now what is the equation?

Answer 41

y-5=3x-6 ?

Answer 42

now I have to simplify that?

Answer 43

yes..add 5 to both sides

Answer 44

y-5=3x-11

Answer 45

??

Answer 46

how did it become 11 o.O it was 6 just a minute ago :O

Answer 47

no wait is y=3x-11

Answer 48

oh umm -6 +5

Answer 49

??

Answer 50

o.O??

Answer 51

O.o??

Answer 52

will you first right the equation? the one with the 6? dont jumpsteps...

Answer 53

y-5=3x-6
and I add 5 both sides
y=3x-11

Answer 54

-6 + 5 is NOT -11

Answer 55

the six (-6)

Answer 56

try again... -6 + 5 is like 5 - 6

Answer 57

-1 o.O?

Answer 58

my bad o.o

Answer 59

-1 is correct.

Answer 60

y = 3x - 1

just like what sanguine said

Answer 61

yeap,

so my final answer is......ta ta tan!
y=3x-1

Answer 62

??

Answer 63

yes

Answer 64

that's for part 1

Answer 65

the very final answer??

Answer 66

just kidding thank you so much!!!!

Answer 67

ur very patient. and kind Thank u for ur help

Answer 68

\[\Huge \color{maroon}{\mathtt{\text{<tips hat>}}}\]

Answer 69

:D

Answer 70

3 billion!

Answer 71

jk!