math 9 long quiz

1. How your score in a test does vary to its equivalent percent?

               

• a. directly

• b. indirectly

• c. inversely

• d. jointly

2. Which of the following represents: “y varies inversely to x” ?

                                                    

• a. y = kx

• b. y =𝑘/𝑥

• c. x = ky    

• d. x = 𝑘 /𝑦

3. If y varies directly to x what happens to y when x is doubled?

                  

• a. doubled

• b. halved

• c. quadrupled

• d. remains the same

4. In the formula, P = 4s, what happens to P when s is doubled?

                                         

• a. P is halved

• b. P is doubled

• c. P is tripled

• d. P is quadrupled

5. y varies directly with x, and y is 84 when x is 16. What is the constant of proportionality?

                                                                                  

• a. y=(21/4)x

• b. k= 21  

• c. k= 5.25

• d. k= 4/21

6. y varies directly as x ,If y = 8, when x = 4, find y when x = 48.

                                        

• a. 88

• b. 24

• c. 48    

•   d. 96

7. y varies directly with x, and y is 16 when x is 32. Which equation represents this situation?

                                                                          

•  a. y=32x

• b. y=16x

• c. y=2x

• d. y=(1/2)x

8. y varies directly with x, and y is 84 when x is 16. What is the constant of proportionality?

                                                                              

• a. y=(21/4)x    

• b. k= 21  

• c. k= 5.25

• d. k= 4/21

9. The amount of tickets in a cinema varies as the number of people who watched it. If the number of people increases, what will be the effect in the amount of tickets?

                                                                    

• a. increases

• b. decreases

• c. doubled

• d. remains the same

10. If m varies directly to n what happens to m when n is halved?

                                                   

• a. doubled   

• b. halved

• c. quadrupled

• d. remains the same