2 . A straight line L
1 passes through the points ( 8 , 0 ) and ( 24 , 32 ) .
( a ) Find the equation of L
1
, giving the answer in general form . [ 3 ]
( b ) The equation of another straight line , L
2
, is given as x � ay � 2021 � 0 , a� . If L
1 and L
2 are perpendicular , find a . [ 2 ]
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