Name: __________________________ Date: _____________



1.
The following table shows the weight, in pounds, and the height, inches, of a sample of children. Graph the scatter diagram for these data.

A.

B.

C.

D.

E.



2.
The following table shows the enrollment, in thousands of students, at Davidson County Community College for selected years.
   
What was the average annual rate of change of the enrollment from 1985 to 2000 (in students per year)? Round your answer to the nearest whole number.
A.
160 students per year
B.
80 students per year
C.
27 students per year
D.
60 students per year
E.
120 students per year


3.
At 7 A.M., the temperature was 54° F. At 2 P.M. on the same day, the temperature was 75 °F. Find the average rate of change in temperature per hour. 
A.
3 °F/hr
B.
C.
4 °F/hr
D.
E.


4.
Is (0, 0) a solution of ?
A.
No
B.
Yes


5.
Find the ordered-pair solution of that corresponds to x = 4.
A.
B.
C.
D.
E.


6.
Graph.
   
A.

B.

C.

D.

E.



7.
Graph.
   
A.

B.

C.

D.

E.



8.
Solve for y. Write the equation in the form y = mx + b.
   
A.
B.
C.
D.
E.


9.
Graph.
   
A.

B.

C.

D.

E.



10.
Graph.
   
A.

B.

C.

D.

E.



11.
Find the x-intercept.
   
A.
B.
C.
D.
E.


12.
Find the y-intercept.
   
A.
B.
C.
D.
E.


13.
Find the x- and y-intercepts of the line
A.
(–1, 0), (0, –3)
B.
(0, –1),   (–3, 0)
C.
(–2, 0), (0, –4)
D.
(–1, 0), (0, 3)
E.
(–2, 0), (0, 4)


14.
Graph by using x- and y-intercepts.
   
A.

B.

C.

D.

E.



15.
Graph by using x- and y-intercepts.
   
A.

B.

C.

D.

E.



16.
Find the slope of the line containing the given points.

A.
–2
B.
2
C.
D.
E.
Undefined


17.
Find the slope of the line containing the given points.

A.
B.
C.
D.
0
E.
undefined


18.
The graph at the right shows how the amount of water in a child's small swimming pool decreases as the water is removed by an electric pump. Find the slope of the line, and write a sentence that states the meaning of the slope.
 
A.
; the amount of water in the pool is decreasing by gal/min.
B.
m = 50; the amount of water in the pool is decreasing by 50 gal/min.
C.
m = –3; the amount of water in the pool is decreasing by 3 gal/min.
D.
; the amount of water in the pool is decreasing by gal/min.
E.
m = –2; the amount of water in the pool is decreasing by 2 gal/min.


19.
Graph by using the slope and y-intercept.
   
A.

B.

C.

D.

E.



20.
Find the equation of the line, in slope-intercept form, that contains the point whose coordinates are and has slope 2.
A.
B.
C.
D.
E.


21.
Use the point-slope formula to find the equation of the line that passes through the point whose coordinates are and has slope 5. Write your answer in slope-intercept form.
A.
B.
C.
D.
E.


22.
Find the equation of the line that contains the point (–5, 22) and has slope –4.
A.
B.
C.
D.
E.


23.
Find the equation of the line that contains the point (–3, 5) and has slope 1.
A.
B.
C.
D.
E.


24.
Find the equation of the line that passes through the points (0, 9) and (–5, 13).
A.
B.
C.
D.
E.


25.
Find the equation of the line that passes through the points (0, 1) and (5, –19).
A.
B.
C.
D.
E.


26.
Graph the solution set.
   x – y < 1
A.

B.

C.

D.

E.



27.
Graph the solution set.
   –x + 2y > –4
A.

B.

C.

D.

E.



28.
Graph the solution set.
   2x – 3y ≥ –6
A.

B.

C.

D.

E.



29.
Graph the solution set.
   y ≥ –2
A.

B.

C.

D.

E.



30.
Is (–5, 4) a solution of the following system of equations?

A.
Yes
B.
No


31.
Solve by graphing.
A.
(1, –3)
B.
(–3, 1)
C.
(–1, –2)
D.
(–2, –1)
E.
inconsistent


32.
Solve by graphing.
A.
(3, 2)
B.
(2, 3)
C.
D.
inconsistent
E.
dependent


33.
Solve by graphing.
A.
(0, 0)
B.
(–4, 4)
C.
(4, –4)
D.
inconsistent
E.
dependent


34.
Solve by graphing.
A.
(0, 2)
B.
(0, –2)
C.
D.
dependent
E.
inconsistent


35.
Solve by substitution:

A.
(2, –10)
B.
(3, –13)
C.
(1, –7)
D.
Dependent,
E.
No solution


36.
Solve by substitution:

A.
(–1, –5)
B.
(0, –1)
C.
(1, 3)
D.
Dependent
E.
No solution


37.
Solve by substitution:

A.
(–3, 1)
B.
(–2, –1)
C.
(–4, 3)
D.
Dependent,
E.
No solution


38.
Solve by substitution.
A.
B.
C.
(4, 5)
D.
inconsistent
E.
dependent


39.
Solve by substitution:

A.
(0, 8)
B.
(–8, 2)
C.
(–4, 5)
D.
Dependent
E.
No solution


40.
Solve by the addition method.
A.
B.
C.
(0, 3)
D.
(0, –3)
E.
dependent


41.
Solve by the addition method:

A.
(–2, –2)
B.
(8, 6)
C.
(3, 2)
D.
Dependent
E.
No solution


42.
Solve by the addition method:

A.
(–1, –4)
B.
(–13, 8)
C.
(–5, 0)
D.
(–9, 4)
E.
No solution


43.
Solve by the addition method:

A.
(2, 3)
B.
(–1, –1)
C.
(5, 7)
D.
Dependent
E.
No solution


44.
Solve by the addition method:

A.
(–6,–9)
B.
Dependent. The solutions satisfy .
C.
(–1, –5)
D.
(–11,–13)
E.
No solution


45.
Solve by the addition method:

A.
(4, 13)
B.
(–8, –23)
C.
(0, 1)
D.
(–4, –11)
E.
Dependent. The solutions satisfy the equation


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