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    Question

    The equation of a line is 2x - 3y = 12. Find the

    perpendicular distance of the point (4, 5) from this line.
    A 2 units Correct Answer Incorrect Answer
    B 3 units Correct Answer Incorrect Answer
    C 4 units Correct Answer Incorrect Answer
    D none Correct Answer Incorrect Answer

    Solution

    The formula for the perpendicular distance of a point (x1, y1) from a line Ax + By + C = 0 is: Distance = |Ax1 + By1 + C| / тИЪ(A┬▓ + B┬▓). For the line 2x - 3y = 12, rewrite it as 2x - 3y - 12 = 0. Substitute x1 = 4 and y1 = 5: Distance = |2(4) - 3(5) - 12| / тИЪ(2┬▓ + (-3)┬▓) = |8 - 15 - 12| / тИЪ(4 + 9) = |-19| / тИЪ13 = 19 / тИЪ13 тЙИ 5.27 units.

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