Chapter 8 Test Review Lessons 8 5 to

Chapter 8 Test Review Lessons 8 -5 to 8 -10 and Graphing Inequalities

Question #1 � The cost of meat varies directly with the number of pounds bought. Suppose 2 pounds cost $9. 50. a. Write an equation that could be used to the unit cost of meat. b. Find the cost of 5 pounds of meat. find

Question #2 � Find the slope of the line that passes through each pair of points. A. C (4, 5) and D (-3, 5) B. Name 2 points that have a slope of 2.

Question #3 � Use the equation 2 x + 4 y = -6. A. State the slope and the y-intercept for graph of the equation. B. Graph the equation using slope and yintercept. the

Question #4 � Write an equation in slope-intercept form to represent the table values. x -3 -1 0 5 y -8 6 13 48

Question #5 � Solve the system of equations by graphing. y= -2 x + 1 y= 3 x -4

Question #6 � Solve each system of equations by substitution. y + x =8 y = 2 x + 2 x = y-3 2 x + y =6

Question #7 � To replace a set of brakes, an auto mechanic charges $40 for parts plus $50 per hour. The total cost y can be given by y=50 x + 40 for x hours. A. Graph the equation using the slope and yintercept. B. State the slope and y-intercept of the graph of the equation and describe what they mean.

Question #8 � The cost of 2 bagels and 2 cans of orange juice is $4. 40. The cost of 3 bagels and 4 cans of orange juice is $7. 80. � A. Write a system of equations to represent this situation. � B. Solve the system of equations by substitution. Explain what the solution means.