SPEED TEST GAME

Which of the statements describes an inverse variation?

• an increase in x causes a decrease in y

• an increase in x causes an increase in y

What is the constant (k) in this inverse variation? y=400/x

• x

• y

• 400

• Not enough information given

Assume y varies inversely with x. If x=7 when y=4, what is y when x=2?

• 4

• 14

• 7

• 28

It occurs whenever a situation produces pairs of numbers whose product is constant.

• Direct Variation

• Joint Variation

• Inverse Variation

• Combined Variation

Which of the following statements DO NOT refer to an inverse variation?

• x varies inversely as y

• x is inversely proportional to y

• x is proportional to y

Whch of the following inverse variation?

• y=kx

• y=k/x

• y=x/k

• y=mx+b

The volume V of a gas kept at a constant temparature varies inversely with the pressure P. If the pressure is 24 pounds per square inch, the volume is 15 cubic feet. What type of variation problem is this and which is the formula?

• V=k x p

• V=k/p

• p=k x V

• p=k/V

x and y vary inversely. Given (5, 20), what is the constant k?

• 4

• 25

• 5

• 100

As the speed of a train increases, the amount of time it takes to arrive at its destination decreases. What type of variation exists between the speed of the train and amount of time?

• Direct Variation

• Neither

• Inverse Variation

• Not enough information

Does the equation show an inverse variation? 
y=10/x

• Yes

• No