Is y=8x a direct variation and if it is, how do you find the constant?

1 Answer
Don't Memorise
Jun 10, 2015

In the variation y=8x
xandy are the variables and 8 itself is the constant, ( c).

Explanation:

y=8x represents a direct variation between variables xandy , where c =8

Looking at few examples:

  • Let x=2,c=8 so y=2×8=16
  • Let x=3,c=8 so y=3×8=24
  • Let x=4,c=8 so y=4×8=32

As the values of x increase, y also increases and here 8 is the constant , only x and y keep varying and hence are variables.

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