1. The set of all second coordinates, or  y-coordinates, of the ordered pairs in a relation is called the______. A. related coordinates B. ordered coordinates C. range D. domain Hint 2. Examine the graph below. Which statement is not true? A. In 1994, about 1,500,000 sport utility vehicles were sold in the U.S. B. The greatest number of sport utility vehicles sold was in 1998. C. Sales of sport utility vehicles were about the same from 1988 through 1991. D. The number of sport utility vehicles sold in the U.S. has increased every year since 1988. Hint 3. If a true statement results when the numbers in an ordered pair are substituted into an equation in two variables, then the ordered pair is a(n)______. A. solution of the equation B. inverse relation C. identity D. range set Hint 4. Select the correct graph for the relation y = -2x if the domain is {-2, -1, 0, 1, 2}. A. B. C. D. Hint 5. Which equation is a linear equation? A. -2x = 5y + 1 B. y2 = 9 C. 3x + 3xy + y = 10 D. xy = 7 Hint 6. Which graph represents the equation y = -x + 4? A. B. C. D. Hint 7. If f(x) = -5x + 8, find f(-1). A. 3 B. 40 C. 2 D. 13 Hint 8. A linear function that can be written in the form y = kx, where k0, is called a(n)_______. A. equivalent variation B. functional variation C. variable variation D. direct variation Hint 9. In physics the equation F = ma means ''force equals mass times acceleration.'' The acceleration of a freely falling object is 9.8 m/s2. Use the function F(m) = 9.8m to find the force in Newtons (N) of a freely falling object with a mass of 14 g. A. 1.43 N B. 137.2 N C. 8.2 N D. 23.8 N Hint 10. Which is the graph of y = -3x A. B. C. D. Hint 11. Which statement is not true about a direct variation? A. y is inversely proportional to x. B. The graph is straight line. C. The constant of variation is . D. y varies directly as x. Hint 12. Alice and Gertrude take 8 hours to mow a lawn. If everyone mows the lawn at the same speed as Gertrude and Alice, how long would it take 4 people to mow a lawn? A. 3 hours B. 6 hours C. 2 hours D. 4 hours Hint