Maths-
General
Easy

Question

The graph of the equation ax + ky = 6 is a line in the xy-plane, where a and k are constants. If the line contains the points (-2 , -6) and (0 , -3), what is the value of k ?

  1. -2
  2. -1
  3. 2
  4. 3

The correct answer is: -2


    given, equation is ax + ky = 6 substitute (0 , -3) point the equation of line.
    a(0) + k (-3) = 6 ⇒ -3k = 6 ⇒ ∴k = -2
    ∴k = -2

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