Question

Which of the following equations would graph a line parallel to 3x -y=7?
A. y=7x-3
B. y=-3x+7
C. y=-7x+3
D. y=3x

Answer 1

do you know what slope means first of all?

Answer 2

Yes, I know the equation to find slope.

Answer 3

place the equation in point-intercept form y=mx+b
then find the equation that has the same m (which is parallel to the line)

Answer 4

no not to find slope
the meaning of slope

Answer 5

then know the meaning of what parallel is

Answer 6

I know what slope and parallel mean, but I can't put it into words.

Answer 7

y = mx+b

Can you locate the slope in this formula?

Answer 8

m = slope

Answer 9

Put this: 3x -y=7
in slope intercept form

Answer 10

y=3x+7
Is this correct?

Answer 11

Okay when we moved everything to the right...

-y= -3x +7

Now, when you divide by a negative don't all your signs change @babysmith ? So double check that...

Answer 12

i mean you do not need to put slope and parallel into words just know what they mean
in saying

parallel means
their slope must be the same

Answer 13

Okay, then yes I understand that.

Answer 14

So once you divided by that -1... you should have gotten what @babysmith ?

Answer 15

@babysmith

-y= -3x +7

Can you solve this? Capturing your earlier mistake?

Answer 16

I don't understand what I'm supposed to divide for. I thought I would leave the equation like this.

Answer 17

You should never have a -y... it should always be positive so divide by negative on both sides.. and tell me what you get.

Answer 18

y = x+7 ?

Answer 19

\[\frac{ -y }{ -1 }=\frac{ -3x }{ -1 }-\frac{ 7 }{ -1 }\]

Answer 20

Try again

Answer 21

y = 3x - 7 ?

Answer 22

It should be plus 7... like you had before. Just make sure you keep in mind every single sign.

y = 3x + 7

They both had double negatives...

Answer 23

Being with what @iforgot told you.. that a parallel line would have the same slope... which answer would you choose?

Answer 24

Ohhh okay I didn't notice the subtractions sign.

Answer 25

Any ideas @babysmith ?

Answer 26

B.

Answer 27

The sign does matter @babysmith

Answer 28

Actually, y = 3x - 7 is correct.

Answer 29

Parallel lines have the same slope. So whatever the answer is, it must have the same slope as y = 3x - 7. @babysmith, what is the slope of y = 3x - 7 ?

Answer 30

3.

Answer 31

Oh my goodness that was so simple. I didn't even realize

Answer 32

So which answer choice has the same slope?

Answer 33

D!

Answer 34

There we go. We all have to watch our signs. They are the cause of much trouble in mathematics if we mix them up. Even I myself have to watch it.

Answer 35

Thank you all! (I never had a problem in mathematics until I started online school, fyi.)