Direct and Indirect Variations

Sketch a graph of an Indirect Variation

Tags

CCSS.8.EE.B.5

Does this represent a Variation?

If so, which kind?

• Direct Variation because y/x

  is constant.

• Indirect Variation because x (y)

  is constant.

• I don't know and I don't care

• It does NOT represent a Variation.

What is the equation that fits this data for either a direct or Inverse Variation?

• Direct Variation

  k=2x

  y=2

• Indirect Variation

  k=2

  y=2x

• Direct Variation

  k=2x

  y=2

• Direct Variation

  k=2

  y=2x

What is the equation that fits this data for either a direct or Inverse Variation?

This ordered pair models an inverse variation.

If x = 20 and y = −4, then k=-80

When x = 10, y = _____?