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

2. 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 find the unit cost of meat.
b. Find the cost of 5 pounds of meat.

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

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

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

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

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

8. 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=50x + 40 for x hours.
Graph the equation using the slope and y-intercept.
State the slope and y-intercept of the graph of the equation and describe what they mean.

9. 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.