Find an equation of the line that contains the given pair of points.?

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Find an equation of the line that contains the given pair of points.
(18,21), (5,8)

The equation is y = ____

2007-05-03 20:21:02 · 3 answers · asked by Anonymous in Science & Mathematics ➔ Mathematics

m = (8 - 21) / (5 - 18)
m = (-13) / (- 13)
m = 1
y - 8 = 1.(x - 5)
y - 8 = x - 5
y = x + 3

2007-05-04 01:41:00 · answer #1 · answered by Como 7 · 0⤊ 0⤋

y=x + 3

use
y-y(1) = m (x-x(1))

m = (y[2]-y[1])/((x[2]-x[1])

2007-05-04 03:28:53 · answer #2 · answered by Anonymous · 0⤊ 0⤋

use the formula:-
(y - y1) = (- ( y2-y1 ) / ( x2-x1 ) ) ( x-x1 )
thus the answer is
y = -x + 13

2007-05-04 03:25:33 · answer #3 · answered by abhinav j 2 · 0⤊ 0⤋