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What is the slope of the line K? (1) (3, a) passes through line K. (2) (a, 3) also passes through line k
At the first look, it would tell you that answer is E as both have a variable 'a', but always buy the values when you are combining two statements. Slope is \(\frac{y_2-y_1}{x_2-x_1}=\frac{3-a}{a-3}=\frac{-1(a-3)}{a-3}=-1\) Thus slope is -1 and both statements combined are sufficient.
What is the slope of the line K? (1) (3, a) passes through line K. (2) (a, 3) also passes through line k
slope of line = y2-y1/x2-x1 #1 we have only 1 set of coordinate available ; not sufficient #2 again not sufficient from 1& 2 x1,y1 and x2,y2 are know slope can be determined IMO C
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Is the answer E, because the question is not asking whether it's positive slope or negative slope.... We don't know what is the value of "a" ... a can take any value.... I don't know whether my approach is right or wrong... Can anyone help me out??
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gmatclubot
Re: What is the slope of the line K?
[#permalink]
05 Feb 2019, 06:57