Question

Which of the following equations describes the line shown below? Check all that apply. (-2,4) (1,13)

Answer 1

A. y+2=3(x-4)
B. y-13=3(x-1)
C. y-4=3(x-2)
D.y-1=3(x-13)
E. y-4=3(x+2)
F. y-2=3(x-4)

Answer 2

@RedoHawk what about this one

Answer 3

@RedoHawk u there

Answer 4

@jcpd910 can u help me

Answer 5

I can help you. :)

Answer 6

y+2=3(x-4)

Isolate y:

y = 3(x-4) - 2

Answer 7

k

Answer 8

(-2,4) (1,13)
Those are the points you're given. Remember a point is: (x,y)

So for the first equation, we can test if the x value matches the y value, like so:

-2 = x

y = 3(x-4) - 2
y = 3(-2 - 4) - 2
y = 3(-6) - 2
y = -18 - 2
y = -20

So when x = -2, y = -20, for this equation. So the ordered pair is:
(-2, -20)
which means it can't be
(-2,4)

So this is False.

Want me to show you how to do one more?

Answer 9

yea

Answer 10

so a will be false right

Answer 11

@dan815 can u help me

Answer 12

I can help.

Answer 13

k

Answer 14

We do b the same way.
y-13=3(x-1)
y = 3(x - 1) + 13
x = -2
y = 3(-2 - 2) + 13
y = 3(-4) + 13
y = -12 + 13
y = 1

So when x = -2, y = 1 for this equation.
(-2,1)
that does not equal
(-2, 4)
so this is False.

Answer 15

k what about c

Answer 16

I think you should try and find that out.

Answer 17

I'll help you every step of the way.

Answer 18

kk

Answer 19

Post your work on here so I can see it.

Answer 20

ok

Answer 21

so c

Answer 22

I want to see your work buddy. :)

Answer 23

y-=3(x-2)

Answer 24

y-4=3(x-2)

Answer 25

Okay, now what?

Answer 26

then y=3(x-2)-4

Answer 27

Not quite, you have to add for to both sides in order to isolate y.

Answer 28

ohhh

Answer 29

then x=1

Answer 30

I want to see all of the work. :)

Answer 31

y=3(x-2)-4
Now what?

Answer 32

k y-4=3(x-2)
then y=3(x-2)-4
then x-1

Answer 33

How do you figure x = -1?

Answer 34

because I subtract 3 from 2

Answer 35

That's not how it works buddy. :) 3 is multiplied by the sum of x - 2.

Answer 36

You can't find x with this equation. You have to sub it in with the point you're given and solve for y.

Answer 37

The reason I'm using -2 for x is because the question gives you that as an x value.

Answer 38

y = 3(x - 2) - 4
And then you plug -2 in for x.
y = 3(-2 - 2) - 4

Answer 39

ughhh this is y I hate math

Answer 40

It's okay, it's difficult sometimes. :) Solve for y when x is -2
y = 3(x - 2) - 4
y = 3(-2 - 2) - 4

Answer 41

You there?

Answer 42

yea

Answer 43

im jus thinking

Answer 44

Okay, so solve this:
y = 3(-2 - 2) - 4

Do you know the first step?

Answer 45

i think you subtract 4 from each side

Answer 46

No, you already isolated y.

Answer 47

PEMDAS
P - parenthesis
E - exponents
M - multiplication
D - division
A - addition
S - subtraction

That's the order of operations, so P comes first. Solve what's inside the parenthesis.

Answer 48

y = 3(-2 - 2) - 4
P
(-2 - 2)

Answer 49

-2-2

Answer 50

Those are minus signs. derp

Answer 51

(-2-2)

Answer 52

(negative two minus two)

Answer 53

yea i no

Answer 54

Okay, so what is it?

Answer 55

-4

Answer 56

Yes, so:
y = 3(-2 - 2) - 4
After P
y = 3(-4) - 4

Answer 57

So there are no exponents, skip E, then go to M.

Answer 58

u multiply 3 from -4

Answer 59

Yes.

Answer 60

7

Answer 61

No, that would be 3 + 4, not 3 * -4.

Answer 62

soo sorry -12

Answer 63

It's fine, so:
y = -12 - 4

Answer 64

Now just subtract.

Answer 65

negative 12 right

Answer 66

-12 - 4 is not -12. :)

Answer 67

no i was saying if the 12 was negative loll

Answer 68

Oh, lol yeah.

Answer 69

-16

Answer 70

Yes, y = -16.

So when x = -2, y = -16 for this equation.
(-2, -16)
Which is not:
(-2, 4)

So C is false. :)

Answer 71

Hey, do me a favor?

Answer 72

yea

Answer 73

I sent you a link to my photo so you can join the domo clan. :D just put it as your picture.

Answer 74

k loll

Answer 75

but in this problem it has to be more than one answer

Answer 76

No, it has to be 1 or more.

Answer 77

Try doing D by yourself, show me each step as you complete it.

Answer 78

k

Answer 79

and join the Domo clan. o.o

Answer 80

You there?

Answer 81

yea

Answer 82

@jcpd910 I here

Answer 83

k
Can you change your pic to the domo plz?

Answer 84

kk

Answer 85

so the answers must be d,e,f

Answer 86

No, we didn't check them.

Answer 87

We have to check and make sure.

Answer 88

k I did

Answer 89

damn that domo is sexy

Answer 90

mk try doing d.

Answer 91

because if a,b,c are false that mean the other 3 are true

Answer 92

loll

Answer 93

No, there only has to be one right answer.

Answer 94

Check all that apply means: Check any answer that is right
Which doesn't mean three are right.

Answer 95

no on this problem it says check all that apply

Answer 96

I know.

Answer 97

Look, watch:
D.y-1=3(x-13)
y = 3(x - 3) + 1
y = 3(-2 - 3) + 1
y = 3*5 + 1
y = 15 + 1
y = 16
So when x = -2 y = 16
Therefor this is false.