(1) Find the slope of the following straight lines
(i) 5y −3 = 0 Solution
(ii) 7 x - (3/17) = 0 Solution
(2) Find the slope of the line which is
(i) parallel to y = 0.7x −11 Solution
(ii) perpendicular to the line x = −11 Solution
(3) Check whether the given lines are parallel or perpendicular
(i) (x/3) + (y/4) + (1/7) = 0 and (2x/3) + (y/2) + (1/10) = 0
(ii) 5x + 23y + 14 = 0 and 23x − 5y + 9 = 0
(4) If the straight lines 12y = −(p + 3)x +12 , 12x −7y = 16 are perpendicular then find ‘p’. Solution
(5) Find the equation of a straight line passing through the point P(-5,2) and parallel to the line joining the points Q(3,-2) and R(-5, 4) . Solution
(6) Find the equation of a line passing through (6,–2) and perpendicular to the line joining the points (6,7) and (2,–3). Solution
(7) A(-3, 0) B(10, -2) and C(12, 3) are the vertices of triangle ABC . Find the equation of the altitude through A and B. Solution
(8) Find the equation of the perpendicular bisector of the line joining the points A(-4, 2) and B(6, -4). Solution
(9) Find the equation of a straight line through the intersection of lines 7x + 3y = 10, 5x − 4y = 1 and parallel to the line 13x + 5y +12 = 0 Solution
(10) Find the equation of a straight line through the intersection of lines 5x −6y = 2, 3x + 2y = 10 and perpendicular to the line 4x −7y +13 = 0 Solution
(11) Find the equation of a straight line joining the point of intersection of 3x + y + 2 = 0 and x − 2y − 4 = 0 to the point of intersection of 7x − 3y = −12 and 2y = x + 3 Solution
(12) Find the equation of a straight line through the point of intersection of the lines 8x + 3y = 18, 4x + 5y = 9 and bisecting the line segment joining the points (5,–4) and (–7,6). Solution
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