Question

What is the equation in standard form of the line which passes through (4, –2) and has a slope of –3?

Answer 1

y - b = m(x - a)

y=y
b=-2
m=-3
x=x
a=4

Answer 2

those arent the choices
x + 3y = 10

x + 3y = –10

3x + y = 10

3x + y = –10

Answer 3

I'm not giving you the answer, you can work it out yourself with what I've given you...

Answer 4

y=mx + c

(4,-2) and m=-3
-2=-3(4) + c
c=.....

now re-write your whole equation with the gradient and y-intercept.

Answer 5

i dont get it i dont get any answer that is on their are you sure your doing it the right way?

Answer 6

y + 2 = -3(x-4)
y + 2 = -3x + 12
Rearrange and you'll get your answer

Answer 7

@ScottB05 im not asking for the answers but can you show me the steps cus im not understanding any of this

Answer 8

yeh, doing @ScottB05 or my way, you should get the same answer.
I think you just have a problem with rearranging the equation.

Answer 9

Well okey, the standard formula for a linear equasion is;

y = m x + c

Y and X are your co-ordinates, M is your gradient or 'slope' and c is your constant.

Now, lets do it Jay's way as it's probebly easier to understand. Sup in x and y (4, -2)

-2 = 4m + c

Now, lets sub in m, -3

-2 = -12 + c

So c = -2 + 12...................c = 10

Now go abck up to the top... Sub in c and m this time to the linear equasion y=mx+c

y = -3x + 10

Rearrange this;

y + 3x = 10

Answer 10

y= 3x - 10 ?

Answer 11

It's -3

Answer 12

And it's + 10

Answer 13

@ScottB05 these are the choices x + 3y = 10

x + 3y = –10

3x + y = 10

3x + y = –10

i think its D

Answer 14

y + 3x = 10 is what I got and that's there at C... But you can work through my working again and see if I made a mistake, but until then I'm pretty confident about it being C

Answer 15

Okay im going to review what you put and thank you for your time and patience :)

Answer 16

No problem :) Good luck ;D