Directiions: write the slope-intercept form of the eqation of the line through the given points.
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1. through: (0,2) and (4,-4) 2. through: (1,4) and (-3,5)
3. through: (5,-5) and (0,0) 4. through: (-4,5)and (-4,3)
5. through: (-1,-2)and (3,-3)
2007-08-02 15:45:55 · 3 answers · asked by sue dean 3 in Science & Mathematics ➔ Mathematics
If you are given two points (x1,y1) and (x2,y2) then the equation is y = [(y2-y1)/(x^2-x1)](x-x1) + y1. So just plug the values in, simplify and you have the answer.
For the 1st problem, you get:
y = [(-4-2)/(4-0)](x-0) + (-4)
y= -3x/2 -4
Now you do the rest.
2007-08-02 16:06:59 · answer #1 · answered by ironduke8159 7 · 0⤊ 0⤋
1.Use y2-y1/x2-x1 for your slope
2.For you intercept write y=mx+b and plug in the y and x values of anyone of the two pairs and then plug in your slope. Isolate B.
3.Construct your equation putting your slope next to X and your intercept at the end.
2007-08-02 22:51:33 · answer #2 · answered by Dill 4 · 1⤊ 0⤋
the formyla is...
Y2-Y1/X2-X1
2007-08-02 22:54:07 · answer #3 · answered by Elisabeth D 2 · 0⤊ 0⤋