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Mathematics
Mathematics
Problem
Which pair of straight lines is perpendicular? a)
y
=
2
x
+
3
and
y
=
1
2
x
−
5
y = 2x + 3 \text{ and } y = \dfrac{1}{2}x - 5
y
=
2
x
+
3
and
y
=
2
1
x
−
5
b)
y
=
4
and
x
=
−
2
y = 4 \text{ and } x = -2
y
=
4
and
x
=
−
2
c)
y
=
4
and
y
=
−
3
y = 4 \text{ and } y = -3
y
=
4
and
y
=
−
3
d)
y
=
−
2
x
+
5
and
y
=
−
1
2
x
−
4
y = -2x + 5 \text{ and } y = -\dfrac{1}{2}x - 4
y
=
−
2
x
+
5
and
y
=
−
2
1
x
−
4
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