Question

Help.. Can some one teach me how to do step by step?
Find the equation of the line with Slope = 310 passing through the point (-10,-11). Write your answer in the form y=mx+b.

Answer 1

m = slope, then you have y = 310x + b. Now you have to plug in x and y to solve for b. Know what I mean?

Answer 2

no idea what you mean :( sorry

Answer 3

how do i find x & y?

Answer 4

That's alright. You already have them thats the coordinates (-10, -11).

Answer 5

Ok take a random point (x,y) and use your given points. We know that gradient = \[(y_2-y_2)/(x_2-x_1)\]
So do (y-11)/(x-(-10))=310 and then cross multiply

Answer 6

sorry meant \[y_2 - y_1\]

Answer 7

Ignore beeqay what I said was correct.

Answer 8

its 3/10 not 310.. sorry

Answer 9

I will list it in steps.

1. m=(3/10) so rewrite the equation y=mx+b as y=(3/10)x+b
2. Plug in the set of coordinates they give you in this case it is (-10,-11) so the equation turns into -11=(3/10)(-10)+b
3. Solve for b
4. rewrite the equation as y = 3/10x + (whatever number you find for b in step 3)

Understand? That's is alright the steps are the same.

Answer 10

That's alright**

Answer 11

lol, you don't do what you have been told above if you are given points.

Answer 12

Beeqay what are you talking about? Read the question again. They need the equation in y=mx+b form. You have the slope and coordinates, but you don't have "b". So obviously you need to solve for "b". Ignore beeqay what I said is correct.

Answer 13

i got y=.3+-8

Answer 14

Okay you are close but you don't write your final answer like that. You write y=-3x-8 know what I mean?

Answer 15

oh , okay :) Thank you

Answer 16

No problem =)

Answer 17

haha b is a constant lad, in this case b would be 14
and your equation would be y= (3/10)x+14
m is 3/10 and b=14
But if you do not wish to understand this then I will not force you to.

Answer 18

Haha man you really don't know when to quit beeqay. I am aware b is a constant and that is what we were solving for because we didn't have that information. If you plug -10 into the equation you wrote you get y=11 and the coordinates are (-10,-11) so clearly you are wrong lad. You are the one who does not understand this obviously.

Answer 19

Let me know if you get y=-3x-8 correct.

Answer 20

oh shoot I meant to write y = (3/10)x-8

Answer 21

Oh I hadn't seen the -10...but y = (3/10)x-8 is correct and you can use whatever method. Because I get the same value if I use -10.

Answer 22

i put in y=.3x-8 and it was correct /: so im not sure lol im sure both of you are right :)

Answer 23

Yea that's correct.

Answer 24

No just me haha, but oh I see you have a decimal next to the 3 yeah thats why because .3=3/10 I thought you just wrote -3 and yeah I just forgot what the slope was, but what beeqay was doing had nothing to do with the question being asked.

Answer 25

Haha you have a very limited way of thinking lad. So how then did I find the right answer using my method?

Answer 26

Okay I see how you could solve for b using your method but it is clearly more difficult and if I have a limited way of thinking then so do you because you also stated that my method was incorrect . Even though it is clearly correct and faster.

Answer 27

Because your answer was incorrect initially. But anyway, the reason why I suggested my method was because at times you are not given the gradient and you have to use the change in y/ change in x so it's good to know the method. But either way, neither of the methods used is hard. I call a truce, I'm tired of arguing.

Answer 28

I wrote the wrong slope and every other time I wrote the correct slope and the method was still correct. Normally you use what you wrote to solve for slope so I assumed you had misread the question. I agree truce sounds good.