ex. (9, -5) & (9, -10)
2007-05-02 04:10:15 · 5 answers · asked by Lucky 3 in Science & Mathematics ➔ Mathematics
1) find the slope, m = (y1 - y2) / (x1 - x2)
2) use the slope and one point to find equation.
(y - y1) = m (x - x1)
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In your example:
m = (-5 - -10) / (9 - 9) = 5 / 0
Slope is undefined which means the equation is a vertical line through whatever the x value of the point is.
So, your equation in this case is x = 9
2007-05-02 04:13:06 · answer #1 · answered by Mathematica 7 · 1⤊ 1⤋
With the two points you've given, you can't give the usual equation for a line (y = mx +b). The two points you've given lay on a vertical line through 9 on the x axis so the 'equation' is x = 9.
HTH
Doug
2007-05-02 11:17:14 · answer #2 · answered by doug_donaghue 7 · 1⤊ 0⤋
You have to find the slope first. Here's the slope formula:
m=y2-y1/x2-x1
m=(-10+5)/(9-9)
m=-5/0=undefined
The slope is undefined, so the equation would be x=9.
2007-05-02 12:20:27 · answer #3 · answered by Anonymous · 0⤊ 0⤋
these 2 coordinates have the same x-coordinate, hence it is a straight vertical line. Equation is x = 9.
2007-05-02 11:14:02 · answer #4 · answered by QiQi 3 · 1⤊ 0⤋
Check out this link to see the explanation
note: you might have to make the image larger
http://i150.photobucket.com/albums/s91/jim_thompson5910/equation.jpg
2007-05-02 11:33:10 · answer #5 · answered by Jim 5 · 2⤊ 0⤋