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A day full of math games & activities. Find one near you.
What is the equation of the line that passes through the points (-12, -8) and (-17, -16)?
Solution:
The equation of the line passing through two points can be found by using two point form of straight lines.
(x - x1) / (x2 - x1) = (y - y1) / (y2 - y1)
Given, two points are (-12, -8) and (-17, -16).
The equation becomes,
(x - (-12)) / (-17 - (-12)) = (y - (-8)) / (-16 - (-8))
By further calculation,
(x + 12) / (-17 + 12) = (y +8)/(-16 + 8)
(x + 12)/(-5) = (y + 8)/(-8)
So we get,
(-8)(x + 12) = (-5)(y + 8)
8(x + 12) = 5(y + 8)
Using the multiplicative distributive property,
8x + 96 = 5y + 40
8x - 5y + 56 = 0
Therefore, the equation of the line is 8x - 5y + 56 = 0.
What is the equation of the line that passes through the points (-12, -8) and (-17, -16)?
Summary:
The equation of the line that passes through the points (-12, -8) and (-17, -16) is 8x - 5y + 56 = 0.
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