11. A quadratic inequality is an equation in the form

a. ax + b < 0.

b. ax + b>0 where ar0 or with <,>, or < c. ax²+bx+c> 0 where a # 0 or with >, S, 2, or <. d. ax +by+c> 0 where a#0 or with >, S. 2, or <

12. What is the domain of the given quadratic

function y = 4x²?

a. all positive real numbers c. all real

numbers

b. all negative real numbers d. all non-real

numbers

13. Ms. Joy wants to build a garage for her new car where the length is 5 feet longer than the width. The area should be greater than 150 ft. Which is a possible width of the garage? a. 6 ft

b. 8ft c. 10 ft d. 12 ft 14. A car travels a distance of d km in t hours. The formula that relates d to t is d= kt. What kind of

variation is it?

a. Direct b. Inverse c. Joint

Combined

15. Which of the following describes the inverse a. The number of hours to finish a job to the number of men working. b. The area of the wall to the amount of paint used

variation?

to cover it.

c. The time a teacher spends checking papers to

the number of students.

d. The amount of money raises in a concert to the

number of fickets sold.

16. Which of the following equation represents the

situation: the acceleration (a) of a moving object varies directly as the distance (d) it travels and Inversely as the square of the time (1) it travels. a. a= kt/d b. a=kdt c. a=kd/12 d. a=k/dt

17. When x=5, y=10 and when x=2, y = 4. This is an example of

a. Direct Variation c. Inverse Variation b. Joint Variation d. Combined Variation

18. Which is an example of a direct variation? a. xy=5 b. y 2x c. y=3/x d. ½ =x

19.If x is directly proportional to y, and k is the constant of proportionality, the relationship maybe expressed as a. x=ky b. x=k/y c. xy=k d. y=k/x