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Algebra help?
Which equation is the equation of a line that passes through -10, 3 and is perpendicular to y = 5x - 7 ?
1. Y = 5x + 53
2. Y = -1/5x - 7
3. Y = -1/5x + 1
4. Y = 1/5x + 5
3 Answers
- lenpol7Lv 74 years ago
The perpendicular slope is '-1/5'
Displacing against ( x,y)
y - 3 = -(1/5)(x - - 10 )
y - 3 = -x/5 - 2
y = -x/5 + 1 ( # 3)
- az_lenderLv 74 years ago
The slope must be -1/[slope of original line] = -1/5, so that knocks out choices 1 and 4. The (-10,3) does not satisfy the equation in choice 2, so the answer is choice 3 (where -10 and 3 do satisfy the equation).