anonymous
  • anonymous
I need some help with these two questions. Write an equation in slope-intercept form of the line satisfying the given conditions. Through (-9, -5), parallel to -7x - 5y = 48
Mathematics
  • Stacey Warren - Expert brainly.com
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SOLVED
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jamiebookeater
  • jamiebookeater
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anonymous
  • anonymous
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anonymous
  • anonymous
When two equations are parallel, they have the same slopes.
anonymous
  • anonymous
So you have to first put -7x - 5y = 48 in slope intercept form, which is y=mx+b.

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anonymous
  • anonymous
Alright. Could you possibly solve them and I'll work from the answer to see how it was done? I've spent the last two hours working and these are the last two questions I have.
anonymous
  • anonymous
|dw:1378343629116:dw|
anonymous
  • anonymous
So now you have the slope, -7/5, so plug this and the point (-9, -5) into the point slope formula: y-y1=m(x-x1)
anonymous
  • anonymous
|dw:1378343881126:dw|
anonymous
  • anonymous
Thank you! This helped quite a bit! I still am quite confused on the other question though.
anonymous
  • anonymous
What question?
anonymous
  • anonymous
I posted a picture earlier on in this post. It's number 49. I'm stuck on that one.
anonymous
  • anonymous
Oh!
anonymous
  • anonymous
You just use rise/run. So pick a point on the graph. In this case, I can see (0,5). Then pick another point. I can also see (5,0).
anonymous
  • anonymous
Count how many times you move to the side and up to get from one point to the other. So to get from (5,0) to (0,5), you have to move to the left (run) 5 times and up (rise) 5 times.
anonymous
  • anonymous
Do you understand that, @Nawawi ?
anonymous
  • anonymous
I understand the concept I guess. But I'm not sure how to translate that to the form they want. The answers are like y=-x-6
anonymous
  • anonymous
Because you have to use the point-slope formula: y-y1=m(x-x1)
anonymous
  • anonymous
M is the slope and (x1,y1) is one of the points you choose from the graph.
anonymous
  • anonymous
I see what I did wrong. I'm so sorry. The points on the graph are (0,6) and (6,0). So your slope is -1 (because rise over run is 6/6 and the line is decreasing so it's negative 1). You plug into the formula I gave you using your slope and any point you want (Let's use 6,0): y-y1=m(x-x1) y-0=-1(x-6) Solve it out: y=-x+6
anonymous
  • anonymous
That's your answer. Sorry for my mistake.
anonymous
  • anonymous
Do you see what I did, @Nawawi ?
anonymous
  • anonymous
Yes! thank you for all the assistance! you have been a great help! I finally understand how to do these problems.

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