Variation

What variation is the graph

• direct

• inverse

• neither

What variation is the graph?

• direct

• inverse

• neither

Which equations below are direct variation?

• y = 3x

• y = 3/x

• y = 3x + 1

• y = 3.5x

Which equations below are inverse variation

• $y=\frac{300}{x}$

• $y=300x$

• $y=\sqrt{30}x$

• $y=\frac{10.5}{x}$

• $y=\frac{2}{3}x$

The table is ___________ variation

• direct

• inverse

• neither

The table is ____________ variation

• direct

• inverse

• neither

The pressure in a water hose varies inversely with the length of the hose. If the pressure is 100 psi when the hose is 30 feet, what is the pressure of a 60 foot hose?

• 100 psi

• 50 psi

• 20 psi

• 200 psi

If f varies directly with g and the cube of h, when f = 200 g = 5 and h = 4. Find f when g = 3 and h = 6.

• 405

• 205

• 100

• 105

y varies directly with x and inversely with z. When y = 22, x = 4 and z = 6. Find y when x = 10 and z = 25

• 10.5

• 13.2

• 22.5

• 55

The maximum load that a cylindrical column can hold varies directly with the 4th power of the diameter and inversely with the square of it's height. A 9 meter high column with a diameter of 2 meters will support 64 metric tons. How many metric tons can be supported by a 9 meter column that's 3 meters in diameter?

• 64 metric tons

• 200 metric tons

• 324 metric tons

• 81 metric tons