anonymous
  • anonymous
Which of these equations represent functions? Check all that apply. A. y = 2x + 1 B. y = x C. y = root of x-4 D. (x - 1)^2 + (y - 1)^2 = 4
Mathematics
  • Stacey Warren - Expert brainly.com
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SOLVED
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chestercat
  • chestercat
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anonymous
  • anonymous
i know a is a function but what about b,c, and D
ganeshie8
  • ganeshie8
b is a line
anonymous
  • anonymous
so a and b are functions

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ganeshie8
  • ganeshie8
if you have geogebra, plot all of them. and see which one doesnt pass "vertical line" test
ganeshie8
  • ganeshie8
yes a and b are functions. we can figure them out directly
ganeshie8
  • ganeshie8
c is also obvious if u knw the parabola equation
anonymous
  • anonymous
and D looks like a property
ganeshie8
  • ganeshie8
d when you plot you wil see its a circle.
anonymous
  • anonymous
so it's all of them except D!
ganeshie8
  • ganeshie8
Yes ! circle intersects the vertical line at two places everywhere... so its not a function

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