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posledela
3 years ago
14

What is the equation of the line that passes through (-9,12) and is perpendicular to the line whose equation is y=1/3x 6?

Mathematics
1 answer:
tigry1 [53]3 years ago
6 0
Y = 1/3x ? 6....slope here is 1/3. A perpendicular line will have a negative reciprocal slope. All that means is " flip " the slope and change the sign. So our perpendicular line will have a slope of -3 (see how I flipped 1/3 and changed the sign)

y = mx + b
slope(m) = -3
(-9,12)...x = -9 and y = 12
now we sub and find b, the y int
12 = -3(-9) + b
12 = 27 + b
12 - 27 = b
-15 = b

so ur perpendicular equation is : y = -3x - 15
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