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find the value of a so that the points A(6, 2a) and B(-a, -2) lie on a line having slope 7.

 Feb 6, 2021
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Slope = (y1-y2)/(x1-x2)

   7     = (2a- -2)/(6 - -a)

   7     = ( 2a+2)/(6+a)      solve for 'a'

   7 (6+a) = 2a+2                you should be able to take it from here !  laugh

 Feb 6, 2021

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