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The number of integral values of m for which the x-coordinate of the point of intersection of the lines 3x + 4y = 9 and y = mx + 1 is also an integer is(A) 2(B) 0 (C) 4 (D) 1 |
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Answer» Correct option (A) 2 Explanation : Solving the given equations, the x-coordinate of their point of intersection is 5/3 + 4m = -5, -1 when m = -1 and 2, respectively. That is for m = -1 and -2, the x-coordinate is also an integer. Hence, the number of integral values is 2. |
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