Variations

If y varies directly as x, and 𝑦 = 32 when 𝑥 = 4. What is the constant of variation?

• 32

• 8

• 4

• 128

What happens to T when h is doubled in the equation T = 4h?

• T is halved

• T is doubled

• T is tripled

• T becomes zero

If y varies inversely as x, and 𝑦 = 32 and 𝑥 = 4. Find the constant (k) of variation.

• 16

• 48

• 12

• 128

If y is inversely proportional to x, and y = 20 when x = 6, what is the constant of variation?

• 20/6

• 120

• 26

• 30

Mathie can finish 4 modules (m) in 12 hours (t). If t varies directly as m, how many modules can she finish in 48 hours?

• 48

• 12

• 32

• 16

If y is inversely proportional to x, and y = 20 when x = 6, what is y when x = 15?

• 8

• 120

• 26

• 20/6

If y varies directly as x, and 𝑦 = 32 when 𝑥 = 8. What is y when x = 6?

• 24

• 8

• 4

• 1/4

What does "y varies inversely as x" means?

• As the value of y increases, the value of x become zero

• As the value of y increases, the value of x decreases

• As the value of y decreases, the value of x also decreases

• As the value of y increases, the value of x also increases

 If y varies directly as x and inversely with z, what is the constant of variation? 

• k = (yz)/x

• k = xyz

• k = (xy)/z

• k = (xz)/y

 If y varies directly as x and inversely with z, what is the constant of variation if x = 2, y =3, and z = 4?

• k =9

• k = 6

• k = 24

• k =8