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A correct description of the line defined by y-6= -1/2(x+7) is

a. it is a line through (-7,6) with a slope of 1/2

b. it is a line through (7,-6) with a slope of -1/2

c. it is a line through (-7,6) with a slope of -1/2

d. it is a line through (7,-6) with a slope of 1/2