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Home Q & A Board Science-Related Homework Help Mathematics
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riza riza
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Posts: 103
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11 years ago
Write a slope-intercept equation for a line passing through the given point that is parallel to the given line. Then write a secon equation for a line passing through the given point that is perpendicular to the given line.
(3,-9); 8x+7y=3

Parallel line: y=

Perpendicular line: y=
Oops wrong problem. Please solve this one instead.

(1,-4); 7x+4y=9
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2 Replies
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wrote...
#1
11 years ago
rewrite to y = mx + b
y = (-7/4)x + 9/4

-4 = (-7/4)(1) + b    plug in coordinates to solve for new y intercept
-2 1/4 = b              solve for b

y = (-7/4)x -2.25    parallel lines have same slope and different y int
y= (4/7)x -2.25      perpindicular lines have opposite reciprocol slopes and same y int
Answer accepted by topic starter
firebird39firebird39
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#2
11 years ago
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