What positive value of k would make the lines below parallel in the standard ( x, y) coordinate plane? kx + 2y.
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Transcript What positive value of k would make the lines below parallel in the standard ( x, y) coordinate plane? kx + 2y.
What positive value of k would make the lines below parallel in the
standard ( x, y) coordinate plane?
kx + 2y = 8
18x + ky = 12
F.
0
G.
2
H.
6
J.
8
K.
12
The correct answer is H.
Explanation:
Parallel lines have equal slopes; kx 2 y 8,
so, 2 y -kx 8, y
-k
x 4.
2
18
12
18 x ky 12, so ky 18 x 12, y
x . The slopes must be equal, so
k
k
-k 18
,k 36, k 6. A positive value is required, so k 6.
2
k
2