Use the given conditions to write an equation for the line in standard form.
Passing through (5,-9) and perpendicular to the line whose equation is 2x - 3y = 7
Write an equation for the line in standard form.
SOLUTION :
Line to which the required line is perpendicular is given as : 2x - 3y = 7
=> y = 2/3 x - 7/3
Its slope = 2/3
Slope of required line perpendicular to it = -1 / (2/3) = - 3/2 .
So, equation of the required line is :
y = - 3/2 x + c
Since point (5, - 9) is on this line,
- 9 = - 3/2 (5) + c
=> c = - 9 + 15/2
=> c = - 3/2
So, equation of the required line is :
y = - 3/2 x - 3/2
In standard form equation is :
3/2 x + y = - 3/2
Multiply by 2 .
We get equation in standard form with integers only :
=> 3x + 2y = - 3 (ANSWER).
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