Analysis and Approaches for IBDP Maths Ebook 1 | Page 89

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3. A straight line L
1
passes through the points (5,1) and (17, 37) .
(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 3x� y�100 � 0 . Are L
1
and
L
2
parallel? Explain your answer.
[2]
4. A straight line L
1
passes through the points ( � 4, 0) and (4, 40) .
(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�5y�150 � 0. Are L
1
and
L
2
perpendicular? Explain your answer.
[2]
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