m = (- 5 + 4) / (- 6 + 3)
m = (- 1) / (- 3)
m = 1 / 3
y + 5 = (1/3) (x + 6)
y + 5 = (1/3) x + 2
y = (1/3) x - 3
2007-12-29 18:55:53
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answer #1
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answered by Como 7
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first calculate the slope, m = (change in y)/(change in x)
m = (-4 - -5)/(-3 - -6) = (1/3) = m
calculate the y intercept (b), by plugging either one of the given x-y pairs into the general form of a linear equation, y =mx + b.
-4 = (1/3)*-3 + b
b = -3
thus the equation would be y = (1/3)*x - 3.
you can verify that this works by plugging in the x value (-6) from the second point, and seeing if the equation calculates the correct y-value.
y = (1/3)*(-6) -3
y = -5
which is the y-value of the second point.
2007-12-29 16:28:02
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answer #2
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answered by mikenwu99 3
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The first step is to find the slope (which is usually represented by m). The slope formula is
m = (y2 - y1)/(x2 - x1)
where x1 = -3, y1=-4, x2=-6, and y2 = -5.
Thus the slope is
m = (-5 - (-4))/(-6 - (-3))
m= (-5+4)/(-6+3)
m=-1/3
So, the slope is -1/3
The next step is rather simple. You simply apply the formula
y - y1 = m(x - x1)
When you put in the appropriate values, you should get this
y = (1/3)x - 3
Hope this helps. If you have any calculus problems, visit my site: calculus4engineeringstudents.com, or send an email: timothyadu77@yahoo.com
2007-12-29 17:08:03
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answer #3
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answered by Anonymous
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x step is 3 (-3-(-6))
y step is 1
so slope is 1/3
y = 1/3x + n
y = 1/3 -3 +n = -1 +n
-4 = -1 + n
n = -3
y= 1/3 x -3
test
-5 = 1/3(-6) -3
-2 = -6/3 = -2
so that works
2007-12-29 16:38:18
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answer #4
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answered by mark 6
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y=1/3x-3
You have to plot the two points on the graph and then you'll be able to find the slope(rise over run.) Then you find the y-intercept
by finding the point the line crosses the y-axis. Then u plug the
slope and the y-intercept into the equation y=mx+b.
M=slope
B=y-intercept
2007-12-29 16:32:17
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answer #5
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answered by Kristi 1
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line through (--3, --4) and (--6, --5) is
y + 5 = (-- 4 + 5) / ( -- 3 + 6) (x + 6)
Or y = (1/3)x -- 3
slope = 1/3, y-intercept = -- 3
2007-12-29 16:26:35
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answer #6
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answered by sv 7
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point slope formula:
y - y1 = m * (x - x1)
(x,y) = (-3,-4)
(x1,y1) = (-6,-5)
y - y1 = m * (x - x1)
-4 - (-5) = m * (-3 - (-6))
-4 + 5 = m * (-3 + 6)
1 = m * 3
m = 1/3
slope = 1/3
let y-intercept be at (x2,y2), or (0,y2)
use point slope formula
y - y2 = m * (x - x2)
-4 - y2 = (1/3) * (-3 - 0)
-4 - y2 = -1
y2 = -3
y-intercept = -3
y = m*x + b
y = (1/3)*x - 3
2007-12-29 16:29:05
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answer #7
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answered by michael_p87 2
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m=(-5+4)/(-6+3)=3
immediately we can write y=3x+b
substitube (-6,-5)
-5=-18+b
b=13
y=3x+13
2007-12-29 16:24:38
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answer #8
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answered by someone else 7
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