Maths-
General
Easy
Question
A line make zero intercepts on x – axis and y – axis and it is perpendicular to the line 3x +4y+ 6 = 0 then its equation is
- y = x
- 4x – 3y = 0
- 4x – 3y + 8 = 0
- 4x – 3y + 6 = 0
Hint:
Assume the equation of line is . It is given that y- intercept is zero so . When two lines are perpendicular the product of their slopes is
The correct answer is: 4x – 3y = 0
Let the equation of the line is
Step1: Line making zero intercept on the x and y axis.
Since the line is making is making zero intercept with y- axis then
Step2: Line perpendicular to .
When two lines are perpendicular the product of their slopes is equal to .
The slope of a line is given by . Therefore the slope of the given line is
Slope of line to find is .
Then according to the property of perpendicular lines
=>
Therefore the equation of the line will be where and
=> or
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