The following set of ordered pairs is an example of direct variation, find the constant ratio between the variables. (Hint: Find
k.)
(2, 4) (5, 10) (7, 14) (11, 22)
A. k=2
B. k=8
C. k=-2
D. k= 1/2
1 answer:
Direct variation looks like
y=kx, so
k=y/x
<span>(2, 4) k=4/2=2
(5, 10) k=10/5=2
(7, 14) k=14/7=2
(11, 22) k=22/11=2
Answer:A.k=2.</span>
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