anonymous
  • anonymous
determain wheather y varies directly with x. -4y=8x+16
Mathematics
  • Stacey Warren - Expert brainly.com
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SOLVED
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katieb
  • katieb
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amistre64
  • amistre64
yes: y = x plus alot of noise
amistre64
  • amistre64
y = 1/x is an inverse relationship; y = x is a direct relationship
anonymous
  • anonymous
yes y=1 is not an option so thats wronq

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amistre64
  • amistre64
its hard to tell; why would you put y=1 as an answer?
amistre64
  • amistre64
y varies directly with x is TRUE in this context.
anonymous
  • anonymous
is it 2 -4 or 8?
anonymous
  • anonymous
what if you decide to make either x or y the subject?
amistre64
  • amistre64
....is what 2 -4 or 8?
amistre64
  • amistre64
you have the equation of a line; it has an infinite number of solutions...
amistre64
  • amistre64
the slope of that line is -2.... 8/-4 = -2 so the change in y with respect to x is -2.
anonymous
  • anonymous
amistres but you have not prooved that the two vary directly

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