Snickers
  • Snickers
I'm trying to figure out how to sketch a gragh witha line of y=-2x+5 and label exactly points don't know what to really do?
Mathematics
  • Stacey Warren - Expert brainly.com
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SOLVED
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jamiebookeater
  • jamiebookeater
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anonymous
  • anonymous
First find the intercepts. Plug in y=0. Plug in x=0.
anonymous
  • anonymous
Y=0 would give us x=5/2 X=0 would give us y=5
anonymous
  • anonymous
Now if you have drawn a grid. You can easily put atleast these two points in.

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anonymous
  • anonymous
| | <-----would be y=5 when x=0 ------- | ^ | | | would be x=5/2 when y=0
anonymous
  • anonymous
Then comes our other piece of information: The slope. In our case it is -2. The negative tells us the line is "falling down". The 2 tells us that for every 1 in the x-direction the y changes by 2.
anonymous
  • anonymous
You can always try plugging in any X of your choice and the equation will spit back at you the Y that goes with it. So if you put in x=1, y= -2(1) + 5 = 3. You can plot the point (1,3) .
Snickers
  • Snickers
cool thank you it's starting to make more sense now.
anonymous
  • anonymous
Sketching a curve means plotting ALL of these points! But if we know a few we can just connect the dots and it will give us a good idea what it looks like.
Snickers
  • Snickers
wouldn't x=-5/-2?
anonymous
  • anonymous
The negatives will cancel out. (-1)*(-1) = 1 or -1/-1 = 1

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