arrissa1234hinkle
24.06.2019 •
Mathematics
What is the equation of the line that passes through (-2, 2) and (1, -4)?
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Ответ:
(y - yo) = m.(x - xo)
Put both points:
(2 - (-4)) = m.(-2 - 1)
2 + 4 = m.(-3)
6 = -3m
m = 6/-3
m = -2
So -2 is the slope of this line
Now we have:
(y - yo) = -2.(x - xo)
Just put one point now.
y - (-4) = -2.(x - 1)
y + 4 = -2x + 2
y = -2x + 2 - 4
y = -2x - 2
Ответ: