Inverse Rational Functions

Which equation represents inverse variation between x and y?

• 4y=kx
• xy = 4k
• y = 4kx
• 4k = x/y

The ordered pair (3.5,1.2) is from an inverse variation. What is the constant of variation?

• 2.3
• 2.9
• 4.2
• 4.7

Suppose x and y vary inversely, and x = 4 when y = 9. Which function models the inverse variation?

• y = 36/x
• x = y/36
• y = x / 36
• x/y = 36

Suppose x and y vary inversely, and x = -3 when y = 1/3. What is the value of y when x = 9?

• -9
• -1
• -1/9
• 1/9

In which function does t vary directly with q and r and inversely with s?

• t = (kq)/(rs)
• t = (ks)/(qr)
• t = s/(kqr)
• t = (kqr)/s

A student suggests that the graph represents the inverse variation y = 3/x. Is the student correct? Why or why not?

• Yes, because the points get smaller from left to right.
• Yes, because the points prove the constant of variation is 3.
• No, because the points prove the constant of variation is 6.
• No, an inverse variation graph is a straight line with a positive slope.

Tags

CCSS.8.EE.B.5

Solve the equation for x.

• 6
• 12
• 0
• 3

Tags

CCSS.HSA.REI.A.2

Solve the equation for x.

• 11
• 3
• 6
• no solution

Tags

CCSS.HSA.REI.A.2

Solve the equation for x.

• 9
• 41
• 1
• 41/19

Tags

CCSS.HSA.REI.A.2

Solve the equation for x.

• 7
• 6
• 14
• 0

Tags

CCSS.HSA.REI.A.2