anonymous
  • anonymous
will you please show me a graph -8, -11
Mathematics
chestercat
  • chestercat
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anonymous
  • anonymous
u mean graph that coordinate?
anonymous
  • anonymous
(-8, -11)?
anonymous
  • anonymous
It is just a point 8 units left of the x/y axis, 11 units down

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anonymous
  • anonymous
yepp :) agreed with rickjbr!
anonymous
  • anonymous
|dw:1327679050325:dw|
anonymous
  • anonymous
I have to show each system by graphing. its y = 3x =3 y = x-3 The answer is -8, and -11. But what does the graph look like to this I need to show the arrows
anonymous
  • anonymous
You plug in values for x and solve for y. Then you draw a line through two or more points. You only need 2 points to draw the line, however.
anonymous
  • anonymous
Therefore, Rick what does the graph look like
anonymous
  • anonymous
Why do you say y=3x=3?
anonymous
  • anonymous
Is there one equation or more?
anonymous
  • anonymous
What is the equation you are trying to graph?
anonymous
  • anonymous
No its y=3x+13 Y=x-3 im sorry
anonymous
  • anonymous
You need to graph two lines?
anonymous
  • anonymous
i know but how
anonymous
  • anonymous
For my anwer for my graph i got -8,-11
anonymous
  • anonymous
You have equations in the form of y=mx+b m is the slope, b is the y-intercept, which is where the line will intersect the y axis
anonymous
  • anonymous
ok and then i graph it right? what would that look like
anonymous
  • anonymous
What you need to do is plug in two values for x for each equation, then draw a line through the points (x1, y1) and (x2, y2)
anonymous
  • anonymous
ok can you show my i am really having troble with this
anonymous
  • anonymous
so for y=3x+13, you can plug in 1 for x and 2 for x When you plug in 1, y will be 16. When you plug in 2, y will be 19. So plot two points (1,16) and (2,19) and draw a line through them
anonymous
  • anonymous
Another way to do this is to only put in one point and then use the slope. In y=3x+13, the slope is 3/1 (the m in y=mx+b)
anonymous
  • anonymous
ok thanks alot you really help!!!
anonymous
  • anonymous
Then for every 1 unit you increase x, y will increase by 3 units.
anonymous
  • anonymous
You're welcome
anonymous
  • anonymous
Do you understand now?
anonymous
  • anonymous
yep thanks : )
anonymous
  • anonymous
Sure thing.
anonymous
  • anonymous
well, wait - I draw the graph, it doesn't look right. What would yours look like
anonymous
  • anonymous
I'll try to draw one for you y=3x+13
anonymous
  • anonymous
Actually i'll draw y=x-3 so i don't have to draw so many hashes
anonymous
  • anonymous
|dw:1327680173064:dw|
anonymous
  • anonymous
You see how in y = x-3, the line intersects the y axis at (0,-3)? That's because in y=mx+b, b is the y intercept. The line will cross the y axis at the y intercept
anonymous
  • anonymous
in y = x-3, b = -3
anonymous
  • anonymous
the slope (m) is 1/1, so for every 1 unit increase in x, y increases only 1 unit as well
anonymous
  • anonymous
Did your graph for y = x-3 look anything like that?

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