1.   Determine the value of r so that the line through (5, 2) and (7, r) has a slope of .
   
    A. 6 B. 2
    C. 3 D. 1
    Hint

  2.   Determine the value of r so that the line through (r, 4) and (-7, 7) has a slope of .
   
    A. -11 B. 9
    C. 3 D. -3
    Hint

  3.   Which line has a slope of and passes through (2, -4)?
    A.
    B.
    C.
    D.
    Hint

  4.   What is the slope of in parallelogram ABCD?
   
    A. B.
    C. D.
    Hint

  5.   Which of the following pairs of coordinates are on a line with an undefined slope?
    A. (-2, -2), (4, 4) B. (-4, -3), (3, -3)
    C. (2, 1), (5, -2) D. (3, -2), (3, 5)
    Hint



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