Which pair of points lie on the same side of 3x - 8y - 7 = 0 ? - Vidyadip

MCQ

Which pair of points lie on the same side of 3x - 8y - 7 = 0 ?

A
(0,-1) and (0, 0)
B
(4,-3) and (0, 1)
C
(-3,-4) and (1, 2)
✓
(-1,-1) and (3, 7)

✓

Answer

Correct option: D.

(-1,-1) and (3, 7)

(D)
$L_{(-1,-1)}=3(-1)-8(-1)-7<0$
and $L _{(3,7)}=3 \times 3-8 \times 7-7<0$
Hence, $(-1,-1)$ and $(3,7)$ lie on the same side of line.

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