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Mathematics
Mathematics
Problem
The lines
y
=
m
x
y = mx
y
=
m
x
,
y
+
2
x
=
0
y + 2x = 0
y
+
2
x
=
0
,
y
=
2
x
+
k
y = 2x + k
y
=
2
x
+
k
and
y
+
m
x
=
k
y + mx = k
y
+
m
x
=
k
form a rhombus if
m
m
m
equals a.
−
1
-1
−
1
b.
1
2
\frac{1}{2}
2
1
c.
1
1
1
d.
2
2
2
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