Direct or Inverse Proportionality

Classify the equation:
15x=3y

• Direct Variation

• Inverse Variation

• Joint Variation

• Linear Equation

Y varies inversely with x, and y is 0.5 when x is 4. Which equation represents this situation?

• y=2x

• y=2/x

• y=4x

• y=x/2

True or False:
An inverse variation is always a curve and a direct variation is always a line?

• True

• False

Is the given table a direct or inverse variation? What is the constant of variation?

• Direct, 12

• Inverse, 12

• Direct, 1/12

• Inverse, 1/12

• direct variation
• inverse variation
• joint variation
• none of these

Is the given table a direct variation? If so, what is the constant of variation?

• Yes; 1/3

• Yes; 3

• Yes; 5

• No

Which of the given graphs is a direct variation?

• A

• B

• C

• D

• direct variation
• inverse variation
• neither direct nor inverse variation

• direct variation
• inverse variation
• neither direct nor inverse variation

• direct variation
• inverse variation
• joint variation
• none of these