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Option 1. The equation that represents the direct variation that exists between a and b is b = –a.
<h3>How to find the direct variation here</h3>The direct variation is of this form y ∝ x
This gives the equation
y = kx
The constant is k
From our question we have
b ∝ a so b = ka
b =
a =
Remember that b = ka
This would cancel out to
1 = -k
or k = -1
Hence the equation would be written as
b = -a
Read more on direct variation here:
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If you look at the red blue and purple dots you can see that they form a straight line. if you connected the green dot to the line it would make the line not straight, therefore the relationship is not proportional.
(6, 11) is your answer
(6, 11) is your answer