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

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

  3.   Determine the slope of the line graphed below.
   
    A. B.
    C. D. 0
    Hint

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

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



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