Slope = rise over run
rise is change in y, run is change in x
so rise = 9 - 6 = 3
run = -1 - (-3) = 2
therefore slope = 3/2
So using the slope intercept form:
y = mx + b
y = 3/2x + b
we plug in either point to solve for b (the y-intercept):
6 = (3/2)(-3) + b
6 = -9/2 + b
b = 6 + 9/2 = 10.5
y = mx + b where m = 1.5 and b = 10.5
y = 1.5x + 10.5
2006-11-08 11:04:23
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answer #1
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answered by disposable_hero_too 6
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Find the slope by subtracting y coordinates, 9 - 6 = 3, and x coordinates, -1 - -3 = 2, and making a fraction out of them, since slope is change in y (rise) over change in x (run). So your slope is 3/2, and the basic equation is now
y = (3/2)x + b.
To complete it, fill in the the coordinates of one of the points and solve for b:
6 = (3/2)(-3)+b
6 = -9/2 + b
12/2 = -9/2 + b
21/2 = b
So your equation is y = (3/2)x + 21/2
2006-11-08 19:10:54
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answer #2
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answered by Philo 7
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you need to find the slope...then using slope-intercept use one of the coordinates(plugging in for x and y) and find b( y-intercept)...then put your final answer in slope-intercept form y=mx+b...m=slope, b=y-intercept
2006-11-08 19:07:52
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answer #3
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answered by Anonymous
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